Linanthus watsonii
| Linanthus watsonii | |
|---|---|
 | |
| leaves | |
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Embryophytes |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Ericales |
| Family: | Polemoniaceae |
| Genus: | Linanthus |
| Species: | L. watsonii |
| Binomial name | |
| Linanthus watsonii | |
| Subspecies[2] | |
| |
| Synonyms[3] | |
| |
Linanthus watsonii (syn. Leptodactylon watsonii) is a species of flowering plant in the phlox family known by the common name Watson's prickly phlox. It is native to the western United States, mainly in the Intermountain region.
This perennial subshrub forms a mat up to 10 centimeters high. The leaves are usually oppositely arranged. Each is divided into a number of needlelike parts and they measure up to 2 centimeters in length. The flowers are white or yellowish with six lobes on a corolla up to 2.8 centimeters long.[4]
This plant grows in mountains, foothills, and canyons. It grows in rock cracks and cliffsides in a number of habitat types. The soils are calcareous.[4]
The plant is vulnerable to threats because it has a small and limited population size, but it grows in mostly inaccessible locations on the walls of cliffs and canyons, so it is often protected from most threats.[4]
Taxonomy
[edit]In 1870 Asa Gray scientifically described a new species in the Gilia genus which he named Gilia watsonii. It was moved Navarretia by 1891 by Otto Kuntze, but the accepted classification was published in 1961 by Edgar T. Wherry, placing it in Linanthus. Along with its genus it is part of the Polemoniaceae family and the species has three accepted subspecies.[2]
- Linanthus watsonii subsp. dolomiticus – Native to Nevada and Arizona[5]
- Linanthus watsonii subsp. laccolithicus – Native to Arizona[6]
- Linanthus watsonii subsp. watsonii – Native to Colorado, Wyoming, Idaho, Utah, and Nevada[7]
Linanthus watsonii has six synonyms of the species or two of it three subspecies.[8]
| Name | Year | Rank | Synonym of: | Notes |
|---|---|---|---|---|
| Gilia floribunda var. arida M.E.Jones | 1895 | variety | subsp. watsonii | = het. |
| Gilia watsonii A.Gray | 1870 | species | L. watsonii | ≡ hom. |
| Leptodactylon watsonii Rydb. | 1906 | species | subsp. watsonii | = het. |
| Leptodactylon watsonii f. aridum (M.E.Jones) Wherry | 1945 | form | subsp. watsonii | = het. |
| Linanthus watsonii var. dolomiticus (J.M.Porter & R.Patt.) Tiehm | 2023 | variety | subsp. dolomiticus | ≡ hom. |
| Navarretia watsonii (A.Gray) Kuntze | 1891 | species | L. watsonii | ≡ hom. |
| Notes: ≡ homotypic synonym; = heterotypic synonym | ||||
Range
[edit]According to Plants of the World Online Linanthus watsonii is native to six states in the western United States, Nevada, Arizona, Utah, Idaho, Wyoming and Colorado.[2] In Nevada it grows in Nye and Lander counties, but the Natural Resources Conservation Service does not record the species in Arizona. The species is widespread in Utah and mainly found in southern Idaho, with a highly disjunct population to the north in Bonner County. It grows in three western Wyoming counties, Hot Springs, Fremont, and Sweetwater, and also in three western Colorado counties, Moffat, Mesa, and Montrose.[9]
References
[edit]Citations
[edit]- ↑ NatureServe 2026.
- 1 2 3 POWO 2026a.
- ↑ POWO 2026a; POWO 2026d.
- 1 2 3 Moore, L. and S. Friedley. (2006, October 31). Leptodactylon watsonii (Gray) Rydberg (Watson’s prickly phlox): a technical conservation assessment. [Online]. USDA Forest Service, Rocky Mountain Region.
- ↑ POWO 2026b.
- ↑ POWO 2026c.
- ↑ POWO 2026d.
- ↑ POWO 2026a; POWO 2026b; POWO 2026d.
- ↑ NRCS 2026.
Web sources
[edit]- NatureServe (2 July 2026). "Linanthus watsonii". NatureServe Explorer. Arlington, Virginia. Retrieved 17 July 2026.
- NRCS (2026). "Linanthus watsonii". PLANTS Database. United States Department of Agriculture (USDA). Retrieved 17 July 2026.
- POWO (2026a). "Linanthus watsonii (A.Gray) Wherry". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 17 July 2026.
- POWO (2026b). "Linanthus watsonii subsp. dolomiticus J.M.Porter & R.Patt". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 17 July 2026.
- POWO (2026c). "Linanthus watsonii subsp. laccolithicus J.M.Porter & R.Patt". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 17 July 2026.
- POWO (2026d). "Linanthus watsonii subsp. watsonii". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 17 July 2026.
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