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There are about 380,000 known species of plants, of which the majority, some 260,000, produce seeds. They range in size from single cells to the tallest trees. Green plants provide a substantial proportion of the world's molecular oxygen. The sugars they produce by photosynthesis provide the energy for most of Earth's ecosystems, and other organisms, including animals, are herbivores or otherwise dependent on plant materials. (Full article...)
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Second-year plant starting to flower, with a dead stem of the previous year, behind left
Verbascum thapsus, the great mullein, greater mullein or common mullein, is a species of mullein native to Europe, northern Africa, and Asia, and introduced in the Americas, Australia and New Zealand.
It is a hairy biennial plant that can grow to 2 m tall or more. Its small, yellow flowers are densely grouped on a tall stem, which grows from a large rosette of leaves. It grows in a wide variety of habitats, but prefers well-lit, disturbed soils, where it can appear soon after the ground receives light, from long-lived seeds that persist in the soil seed bank. It is a common weedy plant that spreads by prolifically producing seeds, and has become invasive in temperate world regions. It is a minor problem for most agricultural crops, since it is not a competitive species, being intolerant of shade from other plants and unable to survive tilling. It also hosts many insects, some of which can be harmful to other plants. Although individuals are easy to remove by hand, populations are difficult to eliminate permanently. (Full article...)
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Banksia prionotes, commonly known as acorn banksia or orange banksia, is a species of shrub or tree of the genus Banksia in the family Proteaceae. It is native to the southwest of Western Australia and can reach up to 10m (33ft) in height. It can be much smaller in more exposed areas or in the north of its range. This species has serrated, dull green leaves and large, bright flower spikes, initially white before opening to a bright orange. Its common name arises from the partly opened inflorescence, which is shaped like an acorn. The tree is a popular garden plant and also of importance to the cut flower industry.
Banksia prionotes was first described in 1840 by English botanist John Lindley, probably from material collected by James Drummond the previous year. There are no recognised varieties, although it has been known to hybridise with Banksia hookeriana. Widely distributed in south-west Western Australia, B.prionotes is found from Shark Bay (25° S) in the north, south as far as Kojonup (33°50′S). It grows exclusively in sandy soils, and is usually the dominant plant in scrubland or low woodland. Pollinated by birds, it provides food for a wide array of vertebrate and invertebrate animals in the autumn and winter months. It is an important source of food for honeyeaters (Meliphagidae), and is critical to their survival in the Avon Wheatbelt region, where it is the only nectar-producing plant in flower at some times of the year. (Full article...)
In 1765, Forster was commissioned by the Russian government to inspect the new colonies on the Volga. Accompanied by George on the journey, he observed the conditions of the colonists and made scientific observations that were later read at the Russian Academy of Sciences. After making a report that was critical of the Russian administration, Forster left for England without payment in 1766. In England, Forster became the successor of Joseph Priestley as tutor in modern languages and natural history at Warrington Academy where he worked for two years. He made contact with many other naturalists, published a textbook on mineralogy and translated works of the apostles of Linnaeus into English. Invited by the geographer Alexander Dalrymple, Forster moved to London in 1770 in preparation for participation in an East India Company expedition, but the plans fell through. Forster continued to publish translations and scientific works including contributions to North American zoology and botany. In February 1772, he was elected a Fellow of the Royal Society. (Full article...)
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Alloxylon pinnatum, known as Dorrigo waratah, is a tree of the family Proteaceae found in warm-temperate rainforest of south-east Queensland and northern New South Wales in eastern Australia. It has shiny green leaves that are either pinnate (lobed) and up to 30cm (12in) long, or lanceolate (spear-shaped) and up to 15cm (5.9in) long. The prominent pinkish-red flower heads, known as inflorescences, appear in spring and summer; these are made up of 50 to 140 individual flowers arranged in corymb or raceme. These are followed by rectangular woody seed pods, which bear two rows of winged seeds.
Known for many years as Oreocallis pinnata, it was transferred to the new genus Alloxylon by Peter Weston and Mike Crisp in 1991. This genus contains the four species previously classified in Oreocallis that are found in Australasia. Its terminal globular flowers indicate that the species is pollinated by birds. Classified as near threatened under the Queensland Nature Conservation Act 1992, the Dorrigo waratah has proven difficult to keep alive in cultivation. (Full article...)
Ficus obliqua, commonly known as the small-leaved fig, is a tree in the family Moraceae, native to eastern Australia, New Guinea, eastern Indonesia to Sulawesi and islands in the southwestern Pacific Ocean. Previously known for many years as Ficus eugenioides, it is a banyan of the genus Ficus, which contains around 750 species worldwide in warm climates, including the edible fig (Ficus carica). Beginning life as a seedling, which grows on other plants (epiphyte) or on rocks (lithophyte), F.obliqua can grow to 60m (200ft) high and nearly as wide with a pale grey buttressed trunk, and glossy green leaves.
Margaret Sibella Brown (March 2, 1866–November 16, 1961) was a Canadian amateur bryologist specializing in mosses and liverworts native to Nova Scotia. Early in her career she was involved with gathering supplies of sphagnum moss to be used as surgical dressings during World War I, when cotton was in short supply. After the war, she researched mosses from around the world, collecting specimens in Europe, the Caribbean, and the United States, as well as her native Canada. She published several papers in academic journals, some on materials she had collected herself and some cataloging samples collected by other investigators. Samples she collected are now housed at several major herbaria in North America and Europe.
Born into upper-class society, Brown was educated in Halifax, Stuttgart, and London. Although lacking formal scientific training, she has been recognized for her contributions to bryology and as an authority on the mosses and liverworts of Nova Scotia. At the age of 84, Brown was awarded an honorary M.A. degree from Acadia University after declining their offer of a Ph.D. She died at her home in Halifax in 1961 aged 95. In 2010, she was inducted into the Nova Scotia Scientific Hall of Fame. (Full article...)
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Banksia aquilonia, commonly known as the northern banksia and jingana, is a tree in the familyProteaceae and is endemic to north Queensland on Australia's northeastern coastline. With an average height of 8m (26ft), it has narrow glossy green leaves up to 20cm (7.9in) long and 6 to 10cm (2.4 to 3.9in) high pale yellow flower spikes, known as inflorescences, appearing in autumn. As the spikes age, their flowers fall off and they develop up to 50 follicles, each of which contains two seeds.
Symphyotrichum lateriflorum (formerly Aster lateriflorus) is a species of flowering plant in the aster family (Asteraceae). Commonly known as calico aster, starved aster, and white woodland aster, it is native to eastern and central North America. It is a perennial and herbaceous plant that may reach heights up to 120 centimeters (4 feet) and widths up to 30 centimeters (1 foot).
The flowers of calico aster are small compared to most Symphyotrichum species. They have an average of 7–15 short white ray florets, which are rarely tinted pink or purple. The flower centers, composed of disk florets, begin as cream to yellow and often become pink, purple, or brown as they mature. There are roughly 8–16 disk florets, each with five lobes that strongly reflex (bend backwards) when open. The mostly hairless leaves have a characteristic hairy midrib on their back faces, and branching is usually horizontal or in what can appear to be a zigzag pattern. Flower heads grow along one side of the branches and sometimes in clusters at the ends. (Full article...)
Banksia spinulosa, the hairpin banksia, is a species of woody shrub, of the genus Banksia in the family Proteaceae, native to eastern Australia. Widely distributed, it is found as an understorey plant in open dry forest or heathland from Victoria to northern Queensland, generally on sandstone though sometimes also clay soils. It generally grows as a small shrub to 2 metres (7ft) in height, though can be a straggly tree to 6 metres (20ft). It has long narrow leaves with inflorescences which can vary considerably in coloration; while the spikes are gold or less commonly yellowish, the emergent styles may be a wide range of colours – from black, purple, red, orange or yellow.
Banksia spinulosa was named by James Edward Smith in England in 1793, after being collected by John White, most likely in 1792. He gave it the common name prickly-leaved banksia, though this has fallen out of use. With four currently recognised varieties, the species has had a complicated taxonomic history, with two varieties initially described as separate species in the early 19th century. A fourth, from the New England region, has only recently been described. However, there has been disagreement whether one, var.cunninghamii, is distinct enough to once again have specific status. The pre-eminent authority on Banksia, Alex George, concedes there is still more work to be done on the Banksia spinulosa complex. (Full article...)
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Dracophyllum fiordense, commonly known as the Fiordland grass tree, is a species of tree or shrub in the heath family, Ericaceae. It is endemic to the South Island of New Zealand. It reaches a height of 1.5–5.0 metres (5–16 feet) and has tufts of long green leaves at the ends of its branches. Each leaf has a distinctive curled spiral tip. D.fiordense has a pyramid-shaped inflorescence (flower spike) hidden under each clump of leaves, with between 113 and 120 pink flowers on each spike, and later reddish-brown dry fruit; both are around just 2 by 2 mm. It inhabits shrubland, lowland and subalpine forests, and tussock grassland of mountain slopes, gullies, and ridges. Its range covers two main areas: one in Fiordland National Park, and one in Aoraki / Mount Cook and Westland National Parks.
D. fiordense was first described by the New Zealand naturalist Walter Oliver in 1928 and placed by him in the subgenus Dracophyllum. A cladistic analysis using genetic sequencing was published in 2010, which revealed that D.fiordense is closely related to D.menziesii as Oliver had hypothesised. Its conservation status was assessed in 2023 as "Declining". The kākāpō, a flightless bird, feeds on the bases of the leaves by making careful incisions in new shoots. D.fiordense is likely pollinated by insects, and its seeds are later dispersed by the wind. (Full article...)
Pinguicula moranensis/pɪŋˈɡwɪkjʊləˌmɒrəˈnɛnsɪs/ is a perennial rosette-forming insectivorousherb in the flowering plant family Lentibulariaceae. It is native to El Salvador, Guatemala, Honduras and Mexico. A species of butterwort, it forms summer rosettes of flat, succulent leaves up to 10centimeters (4in) long, which are covered in mucilaginous (sticky) glands that attract, trap, and digest arthropod prey. Nutrients derived from the prey are used to supplement the nutrient-poor substrate that the plant grows in. In the winter the plant forms a non-carnivorous rosette of small, fleshy leaves that conserves energy while food and moisture supplies are low. Single pink, purple, or violet flowers appear twice a year on upright stalks up to 25 centimeters (9.8in) long.
The species was first collected by Humboldt and Bonpland on the outskirts of Mina de Morán in the Sierra de Pachuca of the modern-day Mexican state of Hidalgo on their Latin American expedition of 1799–1804. Based on these collections, Carl Sigismund Kunth described this species in Nova Genera et Species Plantarum in 1817. The extremely variable species has been redefined at least twice since, while several new species have been segregated from it based on various geographical or morphological distinctions, although the legitimacy of some of these is still debated. P.moranensis remains the most common and most widely distributed member of the Section Orcheosanthus. It has long been cultivated for its carnivorous nature and attractive flowers, and is one of the most common butterworts in cultivation. (Full article...)
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Georg Forster in 1781, age 26
Johann George Adam Forster, also known as Georg Forster (German:[ˈɡeːɔʁkˈfɔʁstɐ]; 27 November 1754 – 10 January 1794), was a German geographer, naturalist, ethnologist, travel writer, journalist and revolutionary. At an early age, he accompanied his father, Johann Reinhold Forster, on several scientific expeditions, including James Cook's second voyage to the Pacific. His report of that journey, A Voyage Round the World, contributed significantly to the ethnology of the people of Polynesia and remains a respected work. As a result of the report, Forster, who was admitted to the Royal Society at the early age of twenty-two, came to be considered one of the founders of modern scientific travel literature.
After returning to continental Europe, Forster turned toward academia. He taught natural history at the Collegium Carolinum in the Ottoneum, Kassel (1778–84), and later at the Academy of Vilna (Vilnius University) (1784–87). In 1788, he became head librarian at the University of Mainz. Most of his scientific work during this time consisted of essays on botany and ethnology, but he also prefaced and translated many books about travel and exploration, including a German translation of Cook's diaries. (Full article...)
Aquilegia plants typically possess stiff stems and leaves that divide into multiple leaflets. Columbines often have colorful flowers with five sepals and five petals. The petals generally feature nectar spurs which differ in length between species. In North America, morphological variations in spurs evolved to suit different pollinators. Some species and varieties of columbines are naturally spurless. In cultivation, varieties bearing significantly altered physical traits such as double flowering are prevalent. (Full article...)
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Banksia caleyi, commonly known as Caley's banksia or red lantern banksia, is a species of woody shrub of the family Proteaceae native to Western Australia. It generally grows as a dense shrub up to 2m (7ft) tall, has serrated leaves and red, pendent (hanging) inflorescences which are generally hidden in the foliage. First described by Scottish naturalist Robert Brown in 1830, Banksia caleyi was named in honour of the English botanist George Caley. No subspecies are recognised. It is one of three or four related species with hanging inflorescences, which is an unusual feature within the genus.
The exterior of the Grande Galerie de l'Évolution ('Gallery of Evolution'). Drawing plans by architect Louis-Jules André, 1889, when it still was named Galerie de Zoologie ('Gallery of Zoology').
The Jardin des Plantes (French pronunciation:[ʒaʁdɛ̃deplɑ̃t]ⓘ, lit.'Garden of the Plants'), known as the Jardin des Plantes de Paris (French:[-dəpaʁi]) when distinguished from those in other cities, and formerly as the Jardin du Roi, is the main botanical garden in France. Jardin des Plantes is the official name, shortened from Jardin Royal des Plantes Médicinales, as the original purpose of the garden in the 17th century was to grow medicinal plants.
Cotyledon from a Judas-tree (Cercis siliquastrum, a dicot) seedling A cotyledon (/ˌkɒtɪˈliːdən/KOT-ih-LEE-dən) is a "seed leaf" – a significant part of the embryo within the seed of a plant – and is formally defined as "the embryonic leaf in seed-bearing plants, one or more of which are the first to appear from a germinating seed." Botanists use the number of cotyledons present as one characteristic to classify the flowering plants (angiosperms): species with one cotyledon are called monocotyledonous ("monocots"); plants with two embryonic leaves are termed dicotyledonous ("dicots"). Many orchids with minute seeds have no identifiable cotyledon, and are regarded as acotyledons. The Dodders (Cuscuta spp.) also lack cotyledons, as does the African tree Mammea africana (Calophyllaceae). A very small number of dicots have more than two cotyledons, with perhaps Psittacanthus schiedeanus being the most extreme, having up to twelve.
In the case of dicot seedlings whose cotyledons are photosynthetic, the cotyledons are functionally similar to leaves. However, true leaves and cotyledons are developmentally distinct. Cotyledons form during embryogenesis, along with the root and shoot meristems, and are therefore present in the seed prior to germination. True leaves, however, form post-embryonically (i.e. after germination) from the shoot apical meristem, which generates subsequent aerial portions of the plant. (Full article...)
Flowering plants are plants that bear flowers and fruits, and form the cladeAngiospermae (/ˌændʒiəˈspɜːrmiː/). The term angiosperm is derived from the Greek words ἀγγεῖον (angeion; 'container, vessel') and σπέρμα (sperma; 'seed'), meaning that the seeds are enclosed within a fruit. The group was formerly called Magnoliophyta.
Rosa Morning Jewel (1968) James Cocker and Sons is a nursery business located in Aberdeen, Scotland. Founded in 1841(185years ago)(1841) by James Cocker, the company has been owned by the Cocker family for five generations. During the last seventy years, the nursery has introduced more than 100 new rose varieties and holds Royal Warrants from Queen Elizabeth, the Queen Mother, and the Prince of Wales. James Cocker & Sons is best known for creating the hybrid tea rose, 'Silver Jubilee', the popular rose named in honour of the Queen's 25 years reign. The rose was developed by Alec Cocker, and introduced by his wife, Anne Cocker, after Alec's death in 1977. Anne continued to breed roses and manage the company until she was in her eighties. She won multiple horticultural awards and was internationally recognized for her work. (Full article...)
The olive has deep historical, economic, and cultural significance in the Mediterranean. It was one of the first fruit trees to be domesticated, being first cultivated in the Eastern Mediterranean between 6,000 and 4,000 BC. It gradually spread around the Mediterranean Basin via trade and human migration. Olive cultivation was vital to the growth and prosperity of several Mediterranean civilisations. (Full article...)
In botany, the term perennial (per- + -ennial, "through the year") is used to differentiate a plant from shorter-lived annuals and biennials. It has thus been defined as a plant that lives more than 2 years. The term is also loosely used to distinguish plants with little or no woody growth (secondary growth in girth) from trees and shrubs, which are also technically perennials. An estimated 94% of plant species are perennials.
Perennials (especially small flowering plants) that grow and bloom over the spring and summer, die back every autumn and winter, and then return in the spring from their rootstock or other overwintering structure, are known as herbaceous perennials. However, depending on the rigours of the local climate (temperature, moisture, organic content in the soil, microorganisms), a plant that is a perennial in its native habitat, may be treated by a gardener as an annual and planted out every year, from seed, from cuttings, or from divisions. Tomato vines, for example, live several years in their natural tropical/ subtropical habitat but are grown as annuals in temperate regions because their above-ground biomass does not survive the winter. (Full article...)
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Maize (Zea mays, Poaceae) is the most widely cultivated C4 plant.
In botany, C4 carbon fixation is one of three known methods of photosynthesis used by plants. C4 plants increase their photosynthetic efficiency by reducing or suppressing photorespiration, which mainly occurs under low atmospheric CO2 concentration, high light, high temperature, drought, and salinity. There are roughly 8,100 known C4 species, which belong to at least 61 distinct evolutionary lineages in 19 families (as per APG IV classification) of flowering plants. Among these are important crops such as maize, sorghum and sugarcane, but also weeds and invasive plants. Although only 3% of flowering plant species use C4 carbon fixation, they account for 23% of global primary production. The repeated, convergent C4 evolution from C3 ancestors has spurred hopes to bio-engineer the C4 pathway into C3 crops such as rice. C4 photosynthesis probably first evolved 30–35 million years ago in the Oligocene, and further origins occurred since, most of them in the last 15 million years. C4 plants are mainly found in tropical and warm-temperate regions, predominantly in open grasslands where they are often dominant. While most are graminoids, other growth forms such as forbs, vines, shrubs, and even some trees and aquatic plants are also known among C4 plants. (Full article...)
Opuntia, commonly called the prickly pear cactus, is a genus of flowering plants in the cactusfamily Cactaceae, many known for their flavorful fruit and showy flowers. Between 8,000 and 9,000 years ago, the Opuntia prickly pear cactus was domesticated in central Mexico. Cacti are native to the Americas, and are well adapted to arid climates; however, they are still vulnerable to alterations in precipitation and temperature driven by climate change. The plant has been introduced to Australia, southern Europe, the Middle East, and parts of Africa.
Prickly pear alone is also used to refer to the fruit, but may also be used for the plant itself; in addition, other names given to the plant and its specific parts include tuna (fruit), sabra, sabbar, nopal (pads, plural nopales, from the Nahuatl word nōpalli), nostle (fruit) from the Nahuatl word nōchtli, and paddle cactus. The genus is named for the Ancient Greek city of Opus. The fruit and stems are edible. The most common culinary species is the "Barbary fig" (Opuntia ficus-indica). (Full article...)
The arrival of humans around 50,000 years ago and the settlement by Europeans from 1788, has had a significant impact on the flora. The use of fire-stick farming by Aboriginal people led to significant changes in the distribution of plant species over time, and the large-scale modification or destruction of vegetation for agriculture and urban development since 1788 has altered the composition of most terrestrial ecosystems, leading to the extinction of 61 plant species by 2006, and endangering over 1000 more. (Full article...)
Cuscuta, a stem holoparasite, on an Acacia tree in Pakistan A parasitic plant is a plant that derives some or all of its nutritional requirements from another living plant. They make up about 1% of angiosperms and are found in almost every biome. All parasitic plants develop a specialized organ called the haustorium, which penetrates the host plant, connecting them to the host vasculature—either the xylem, phloem, or both. For example, plants like Striga or Rhinanthus connect only to the xylem, via xylem bridges (xylem-feeding). Alternately, plants like Cuscuta and some members of Orobanche connect to both the xylem and phloem of the host. This provides them with the ability to extract resources from the host. These resources can include water, nitrogen, carbon and/or sugars.
Parasitic plants are classified depending on the location where the parasitic plant latches onto the host (root or stem), the amount of nutrients it requires, and their photosynthetic capability. Some parasitic plants can locate their host plants by detecting volatile chemicals in the air or soil given off by host shoots or roots, respectively. About 4,500 species of parasitic plants in approximately 20 families of flowering plants are known. (Full article...)
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Rice plant (Oryza sativa) with branched panicles containing many grains on each stem Rice is a cereal grain and, in its domesticated form, is the staple food of over half of the world's population, particularly in Africa and Asia. Rice is the seed of the grass species Oryza sativa (Asian rice)—or, less commonly, Oryza glaberrima (African rice). Asian rice was domesticated in China some 13,500 to 8,200 years ago; African rice was domesticated independently in West Africa about 3,000 years ago. Rice has become commonplace in many cultures worldwide; in 2023, 800 million tons were produced, placing it third after sugarcane and maize. Only some 8% of rice is traded internationally. China, India, and Indonesia are the largest consumers of rice. A substantial amount of the rice produced in developing nations is lost after harvest through factors such as poor transport and storage. Rice yields can be reduced by pests including insects, rodents, and birds, as well as by weeds, and by diseases such as rice blast. Traditional rice polycultures such as rice-duck farming, and modern integrated pest management seek to control damage from pests in a sustainable way.
Dry rice grain is milled to remove the outer layers; depending on how much is removed, products range from brown rice to rice with germ and white rice. Some is parboiled to make it easy to cook. Rice contains no gluten; it provides protein but not all the essential amino acids needed for good health. Rice of different types is eaten around the world. The composition of starch components within the grain, amylose and amylopectin, gives it different texture properties. Long-grain rice, from the Indica cultivar, tends to stay intact on cooking, and is dry and fluffy. The aromatic rice varieties, such as basmati and jasmine, are widely used in Asian cooking, and distinguished by their bold and nutty flavor profile. Medium-grain rice, from either the Japonica or Indica cultivar, or a hybrid of both, is moist and tender and tends to stick together. Its varieties include Calrose, which founded the Californian rice industry, Carnaroli, attributed as the king of Italian rice due to its excellent cooking properties, and black rice, which looks dark purple due to high levels of anthocyanins, and is also known as forbidden rice as it was reserved for the consumption of the royal family in ancient China. Short-grain rice, primarily from the Japonica cultivar, has an oval appearance and sticky texture. It is featured heavily in Japanese cooking such as sushi (with rice such as Koshihikari, Hatsushimo, and Sasanishiki, unique to different regions of climate and geography in Japan), as it keeps its shape when cooked. It is also used for sweet dishes such as mochi (with glutinous rice), and in European cuisine such as risotto (with arborio rice) and paella (with bomba rice, which is actually an Indica variety). Cooked white rice contains 29% carbohydrate and 2% protein, with some manganese. Golden rice is a variety produced by genetic engineering to contain vitamin A. (Full article...)
Mendel worked with seven characteristics of pea plants: plant height, pod shape and colour, seed shape and colour, and flower position and colour. Taking seed colour as an example, Mendel showed that when a true-breeding yellow pea and a true-breeding green pea were cross-bred, their offspring always produced yellow seeds. However, in the next generation, the green peas reappeared at a ratio of 1 green to 3 yellow. To explain this phenomenon, Mendel coined the terms "recessive" and "dominant" in reference to certain traits. In the preceding example, the green trait, which seems to have vanished in the first filial generation, is recessive, and the yellow is dominant. He published his work in 1866, demonstrating the actions of invisible "factors"—now called genes—in predictably determining the traits of an organism. The actual genes were only discovered in a long process that ended in 2025 when the last three of the seven Mendel genes were identified in the pea genome. (Full article...)
A banana is an elongated, edible fruit that is botanically a berry produced by several kinds of large treelike herbaceousflowering plants in the genusMusa. In some countries, cooking bananas are called plantains, distinguishing them from dessert bananas. The fruit is variable in size, color and firmness, but is usually elongated and curved, with soft flesh rich in starch covered with a peel, which may have a variety of colors when ripe. It grows upward in clusters near the top of the plant. Almost all modern edible seedless (parthenocarp) cultivated bananas come from two wild species – Musa acuminata and Musa balbisiana, or their hybrids.
Musa species are native to tropical Indomalaya and Australia; they were probably domesticated in New Guinea. They are grown in 135 countries, primarily for their fruit, and to a lesser extent to make banana paper and textiles, while some are grown as ornamental plants. The world's largest producers of bananas in 2022 were India and China, which together accounted for approximately 26% of total production. Bananas are eaten raw or cooked in recipes varying from curries to banana chips, fritters, fruit preserves, or simply baked or steamed. (Full article...)
Cirsium vulgare is a species of thistle in the plant family Asteraceae. Native to Europe and Western Asia, it has become naturalised in North America, Africa and Australia, and is an invasive weed in some areas. It is a ruderal species, able to colonise bare ground, but also persists well on pasture as its thorny leaves and stems make it unpalatable to most grazing animals. The flowers are rich in nectar, attracting bees and butterflies, and the seeds are a favourite with goldfinches, linnets and greenfinches. The downy pappus, which assists in wind dispersal of the seeds, is used by birds as nest-lining material.
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The Mingo Oak (also known as the Mingo White Oak) was a white oak (Quercus alba) in the U.S. state of West Virginia. First recognized for its age and size in 1931, the Mingo Oak was the oldest and largest living white oak tree in the world until its death in 1938.
The Mingo Oak stood in Mingo County, West Virginia, in a cove at the base of Trace Mountain near the headwaters of the Trace Fork of Pigeon Creek, a tributary stream of Tug Fork. The tree reached a height of over 200 feet (61m), and its trunk was 145 feet (44m) in height. Its crown measured 130 feet (40m) in diameter and 60 feet (18m) in height. The tree's trunk measured 9feet 10inches (3.00m) in diameter and the circumference of its base measured 30feet 9inches (9.37m). Assessments of its potential board lumber ranged from 15,000 feet (4,600m) to 40,000 feet (12,000m). Following the tree's felling in 1938, it was estimated to weigh approximately 5,400 long tons (5,500t). (Full article...)
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Habit
Hypericum androsaemum, the shrubby St. John's wort, is a species of flowering plant in the family Hypericaceae. It is commonly called tutsan or sweet-amber. It forms a shrub with oval-shaped leaves and yellow flowers.
The species has been known since before the modern system of taxonomy was developed, and was first described by Carl Linnaeus in 1763. Since then, it has been invalidly published under several synonyms, and was repeatedly placed in its own genus named Androsaemum. When Norman Robson published his monograph of the genus Hypericum in 1996, the species was definitively placed within Hypericum sect. Androsaemum, a small section including several other closely related species. (Full article...)
The vegetable is a domesticated form of the wild carrot, native to Europe and Southwestern Asia. The domesticated plant probably originated in Iran where it was cultivated for its leaves and seeds. In 2022, world production of carrots (combined with turnips) topped 42 million tonnes, with China producing 44% of the total. (Full article...)
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The peanut (Arachis hypogaea), also known as the groundnut, goober (US, via Kikongo), goober pea, pindar (US, via Kikongo) or monkey nut (UK), is a legume crop grown mainly for its edible seeds, contained in underground pods. It is widely grown in the tropics and subtropics by small and large commercial producers, both as a grain legume and as an oil crop. Underground fruiting (geocarpy) is atypical among legumes, which led botanist Carl Linnaeus to name the species hypogaea, from Greek 'under the earth'.
Richard Buxton aged 65, daguerreotype by John Benjamin Dancer Richard Buxton (15 January 1785 – 2 January 1865) was a British shoemaker and amateur botanist. Born in Prestwich, Lancashire, to a family who lived in humble circumstances, he taught himself to read, and learned the basic principles of botany. Although living as a pauper for most of his life, in 1849 he published A Botanical Guide to the Flowering Plants, Ferns, Mosses and Algæ, Found Indigenous Within Sixteen Miles of Manchester, which became one of the standard texts on the flora then commonly found in the Manchester area. According to his obituary in the Journal of Botany, British and Foreign, Buxton was one of "nature's gentlemen" and "his true and correct pronunciation of scientific terms have caused many who heard him to believe he was an accomplished classical scholar". He was acknowledged by the geologist Edward William Binney as "the most profound thinker of his class". (Full article...)
Corynocarpus laevigatus was first described in 1776 by the German naturalists Georg and Johann Reinhold Forster. C. laevigatus grows to heights of up to 15–20 metres (50–70 feet) and has a trunk of up to 60 centimetres (20 inches) in diameter. Its leaves are leathery, dark to bright green in colour and up to 15–30cm (6–10in) long. C. laevigatus produces large oval-shaped orange-coloured fruits. C. laevigatus seeds are highly toxic to humans and contain poisonous toxins and other glucosides. The fruits are a valuable food source for the kererū and the Chatham Islands pigeon. C. laevigatus has been introduced to the United States for reforestation purposes; it is naturalised and considered an invasive species on several Hawaiian islands and is mainly found on the island of Kauai. (Full article...)
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Hanging violet-blue berries
Dianella nigra, commonly known as turutu, inkberry, and the New Zealand blueberry, is a species of flowering plant in the family Asphodelaceae. It is endemic to New Zealand. Its range mainly covers the North and South Islands. It is typically found in coastal to montane environments, and the species can colonise various different habitats. A perennial herb, the species is known for its vibrant violet-blue berries and long green leaves.
Dianella nigra was first described in 1884 by the New Zealand botanist William Colenso. D. nigra's pollination strategy is not well-studied. Berries are recorded to be eaten by the silvereye, a small native bird. Despite this, there is a historical record from the late 1800s of an infant death linked to ingestion of the berries, as such, they may be poisonous to humans. Its 2023 conservation status in the New Zealand Threat Classification System is "Not Threatened". (Full article...)
A mango is an edible stone fruit produced by the tropical tree Mangifera indica. It originated in the northeastern part of the South Asia, in what is now Bangladesh, northeastern India and Myanmar. M. indica has been cultivated in South and Southeast Asia since ancient times, resulting in two modern mango cultivar lineages: the "Indian" and the "Southeast Asian" types. Other species in the genus Mangifera also produce edible fruits called "mangoes", most of which are found in the Malesian ecoregion.
There are several hundred cultivars of mango worldwide. Depending on the cultivar, mango fruits vary in size, shape, sweetness, skin colour, and flesh colour, which may be pale yellow, gold, green, or orange. Mango is the national fruit of India, Pakistan, and the Philippines, while the mango tree is the national tree of Bangladesh. (Full article...)
Growing up to 20cm (7.9in) tall, the species blooms in May and June. The flowers are bluish-purple with pale or whitish petals. The species has a small population that, as of 2011, numbered about 2,000 individuals spread across four subpopulations. Human activity, predation by the native Southeastern Spanish ibex, and poor genetic diversity have been cited as risks to the continued survival of A.paui. (Full article...)
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1895 illustration by Johann Gottfried Hallier
Cirsium greimleri, Greimler-Kratzdistellit.'Greimler's thistle', is a perennial species of flowering plant in the family Asteraceae. It was described as a separate species from Cirsium waldsteinii in 2018, from which it can be distinguished visually by its shallower lobes and deeper flower colour. Additionally, its leaves are unusually broad for the genus. It is one of a minority of species discovered through karyological analysis. It is a tall herbaceous plant with nodding purple flowers growing in high montane to subalpine habitats on exposed acidic slopes. It is native to Eastern Europe, but with an unusual geographic distribution. It is found only in the Eastern Alps and Dinaric Alps. It hybridises readily, to the extent that there is concern about genetic erosion for most populations. (Full article...)
Cyperus diandrus, also known as umbrella flatsedge, is a species of flowering plant in the sedge family Cyperaceae. It is native to northeastern North America, ranging from the Maritime provinces of southeastern Canada southward to Virginia, reaching as far west as Nebraska. It is often confused with Cyperus bipartitus, both of which have chestnut-brown scales protecting the flowers. Its season runs from July to October but little else is known about its ecology.
Cyperus diandrus was named and described by John Torrey in 1818. The common name refers to the umbrella-like shape of its flower cluster, known to botanists as an umbel. The specific epithetdiandrus suggests that each flower has "two stamens" (pollen-bearing organs), which is also true of various other species of flatsedges. In Canada, it is referred to as low umbrella flatsedge (French: souchet diandre). In other locales, it is simply known as low flatsedge. (Full article...)
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Hypericum × inodorum 'Golden Beacon' in Belgium
Hypericum × inodorum, called tall tutsan or the tall St John's wort, is a bushy perennialshrub with yellow flowers native to Western Europe. It has been known since 1789, but confusion around its name, identity, and origin persisted throughout the 19th and 20th centuries.
Erythranthe, the monkey-flowers and musk-flowers, is a diverse plantgenus with more than 120 members (as of 2022) in the familyPhrymaceae. Erythranthe was originally described as a separate genus, then generally regarded as a section within the genus Mimulus, and recently returned to generic rank. Mimulus sect. Diplacus was segregated from Mimulus as a separate genus at the same time. Mimulus remains as a small genus of eastern North America and the Southern Hemisphere. Molecular data show Erythranthe and Diplacus to be distinct evolutionary lines that are distinct from Mimulus as strictly defined, although this nomenclature is controversial.
Member species are usually annuals or herbaceousperennials. Flowers are red, pink, or yellow, often in various combinations. A large number of the Erythranthe species grow in moist to wet soils with some growing even in shallow water. They are not very drought resistant, but many of the species now classified as Diplacus are. Species are found at elevations from oceanside to high mountains as well as a wide variety of climates, though most prefer wet areas such as riverbanks. (Full article...)
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Dracophyllum arboreum, commonly known as Chatham Island grass tree and tarahinau (Moriori), is a species of tree in the heath family Ericaceae. Endemic to the Chatham Islands of New Zealand, it reaches a height of 18m (60ft) and has leaves that differ between the juvenile and adult forms.
D. arboreum has wide light green leaves in its juvenile form, which become thin needles as it gains maturity. Flowering occurs from November through to February, yielding small white flowers which later become tiny brown fruit. It inhabits many different types of vegetation communities from near sea level to 270m (886ft), including swamps, cliffs, bogs, and shrublands. It has a range restricted to three Islands some 800km (497mi) east of New Zealand: the Chatham, Pitt, and Rangatira Islands. (Full article...)
... that the name of Diaphoretickes, a group containing a huge diversity of organisms including plants and kelps, is derived from a Greek word meaning diverse?
... that Erna Meyer urged the Jewish immigrant readers of How to Cook in Palestine to try olives and eggplants, but doubted their ability to eat spicy food like the "native population"?
... that Ōtari-Wilton's Bush is the only public botanic garden in New Zealand that is entirely dedicated to native plants?
... that Marie Catharine Neal, an expert on Hawaiian plants, authored the acclaimed book In Gardens of Hawaii in 1948, which described more than 2,000 species with detailed scientific information and illustrations?
Image 7A banded tube from the Late Silurian/Early Devonian. The bands are difficult to see on this specimen, as an opaque carbonaceous coating conceals much of the tube. Bands are just visible in places on the left half of the image. Scale bar: 20μm (from Evolutionary history of plants)
Image 14The Devonian marks the beginning of extensive land colonization by plants, which – through their effects on erosion and sedimentation – brought about significant climatic change. (from Evolutionary history of plants)
Image 21Structure of azadirachtin, a terpenoid produced by the neem plant, which helps ward off microbes and insects. Many secondary metabolites have complex structures (from Evolutionary history of plants)
Image 24Leaf lamina. The megaphyllous leaf architecture arose multiple times in different plant lineages (from Evolutionary history of plants)
Image 25The fruit of Myristica fragrans, a species native to Indonesia, is the source of two valuable spices, the red aril (mace) enclosing the dark brown nutmeg. (from Botany)
Image 26Structure of a plant cell (from Plant cell)
Image 27The branching pattern of megaphyll veins may indicate their origin as webbed, dichotomising branches. (from Evolutionary history of plants)
Image 29The Linnaean Garden of Linnaeus' residence in Uppsala, Sweden, was planted according to his Systema sexuale. (from Botany)
Image 30Paper chromatography of some spinach leaf extract shows the various pigments present in their chloroplasts: yellowish xanthophylls, greenish chlorophylls a and b. (from Botany)
Image 31Echeveria glauca in a Connecticut greenhouse. Botany uses Latin names for identification; here, the specific name glauca means blue. (from Botany)
Image 32The evolution of syncarps. a: sporangia borne at tips of leaf b: Leaf curls up to protect sporangia c: leaf curls to form enclosed roll d: grouping of three rolls into a syncarp (from Evolutionary history of plants)
Image 33A botanist preparing a plant specimen for mounting in the herbarium (from Botany)
Image 341 An oat coleoptile with the sun overhead. Auxin (pink) is evenly distributed in its tip. 2 With the sun at an angle and only shining on one side of the shoot, auxin moves to the opposite side and stimulates cell elongation there. 3 and 4 Extra growth on that side causes the shoot to bend towards the sun. (from Botany)
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