Draft:Ornata clade

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  This is a class discussion paper rather than an encyclopaedia article. 🇵🇸‍🇺🇦 Fiddle^Timtrent Faddle^Talk to me 🇺🇦‍🇵🇸 12:57, 12 August 2026 (UTC)

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The Ornata clade is one of the six major evolutionary lineages of the genus Goeppertia. The lineage includes Goeppertia ornata which was first described as Maranta ornata by Lemaire in 1848 and multiple closely related species. This clade represents a real branch of the Goeppertia evolutionary tree and was supported by molecular phylogenetic studies.

History of the modern Ornata clade

The name Ornata clade came from the informal Calathea ornata group described by Marantaceae expert Helen Kennedy. Members of the original Calathea ornata group were characterized by vegetative, inflorescence, floral characters and a distinctive leaf pattern in most species.

The molecular studies from 2012 showed that the group corresponded to an actual distinct evolutionary lineage of Goeppertia. But even tho Helen Kennedy's work took a big part for the historical fundations of the current Ornata clade, the molecular studies suggested that some species that she included in the original Ornata group actually belung to other major Goeppertia clades.

Although the Ornata clade is a lineage of species of Goeppertia, there are still species with historical association to the Ornata group that are under the Calathea genus. For exemple Calathea calderon-saenzii and Calathea monstera which were described respectively in 2016 and 2013 as species of Calathea, despite the recognition of Goeppertia as a separate genus in the molecular studies published in 2012.

Historical characteristics of the Ornata group

Helen Kennedy's work on the old Calathea ornata group established pretty clear morphological vegetative, inflorescence and floral characters. These are characters used to recognize the historical Ornata group, they are not necessarely characters of every species from the modern molecular Ornata clade.

According to H.Kennedy, species of the Ornata group are characterized by having predominantly basal leaves and occasionally a few cauline leaves. Juvenile leaves are usually patterned with pink or white stripes above between the lateral veins, or, sometimes bearing a secondary "brush" pattern with 2 broad yellowish green bands on each sides of the leaf. The mature foliage is almost always unpatterned as most species lose them as they size up. Inflorescences are single per shoot and their bracts are all fertile, spirally arranged and either persistent or dying early. The actual flowers are opened and go from creamy white to orange and occasionally purple. The fruit capsule is trigonal and usually red, orange or purple. The seeds are blue to dark blue.

Molecular phylogenetic studies on the Ornata group

Earlier work on monophyletic species group within Calathea were mainly based on morphological similarities and lacked taxon coverage and actual genetic testing. The classification Helen Kennedy presented was the most accurate hypothesis according to Finn Borchsenius, Luz Stella Suarez and Linda M. Prince but again lacked molecular evidence. In 2012, molecular sampling were done on 70 Marantaceae species including 43 Calathea species and established 6 major clades under the new classification of the Goeppertia genus, while 2 clades were established for the current Calathea genus. The Goeppertia clades are now respectively, Comosae clade, Breviscapus clade, Microcephalum clade, Scapifoliae clade, Ornata clade and Straminea clade.

Species included in the Ornata group from Helen Kennedy were actually included in the modern molecular Ornata clade such a Goeppertia altissima, Goeppertia gymnocarpa, Goeppertia inocephala and Goeppertia variegata. However, 3 species that were assiociated with the Ornata group were actually recovered in the new defined Straminea clade. Species that were not sampled in the molecular studies should then not be confirmed to be included in the modern molecular Ornata clade.

Species related or included to the Ornata clade

Accepted species name	Historical Ornata group	Molecular Ornata clade
Goeppertia altissima	included	included
Goeppertia bantae	included	not sampled
Goeppertia dilabens	included	not sampled
Goeppertia elliptica	included	not sampled
Goeppertia fragilis	related	not sampled
Goeppertia grandis	included	not sampled
Goeppertia gymnocarpa	included	included
Goeppertia incompta	included	not sampled
Goeppertia inocephala	included	included
Goeppertia longipetiolata	related	not sampled
Goeppertia majestica	included	not sampled
Goeppertia multicincta	included	not sampled
Goeppertia ornata	included	not sampled
Goeppertia pachystachya	included	not sampled
Goeppertia regalis	included	not sampled
Goeppertia sanderiana	included	not sampled
Goeppertia splendida	related	not sampled
Goeppertia steyermarkii	included	not sampled
Goeppertia variegata	included	included
Calathea calderon-saenzii	included	not sampled
Calathea monstera	included	not sampled
Goeppertia cannoides	included	placed in Straminea clade
Goeppertia straminea	included	placed in Straminea clade
Goeppertia zingiberina	included	placed in Straminea clade

Species confusion

According to Helen Kennedy in 1995, while the horticultural industry sells “pinstripe Calathea” houseplants as Goeppertia ornata or Calathea ornata, the majority of these plants are actually Goeppertia sanderiana or Goeppertia majestica. Goeppertia ornata is much more difficult to grow and disappeared from cultivation sometime before the mid-1990s. The confusion exists because most species related to the Ornata group are extremely similar when young and can easily be misidentified.

Media

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  G.majestica
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  G.inocephala
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  G.bantae
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  G.gymnocarpa
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  G.elliptica
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  G.sanderiana
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  G.majestica
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  G.variegata
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  G.incompta
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  G.inocephala
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  G.elliptica
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  G.gymnocarpa

Category:Goeppertia Category:Calathea Category:Zingiberales stubs