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Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Eudicots
Cladus: Core eudicots
Cladus: Rosids
Cladus: Eurosids II
Ordo: Malvales

Familia: Malvaceae
Subfamilia: Byttnerioideae
Tribus: Lasiopetaleae
Genus: Thomasia
Species: T. angustifolia – T. brachystachys – T. cognata – T. dielsii – T. discolor – T. foliosa – T. gardneri – T. glabripetala – T. grandiflora – T. julietiae – T. laxiflora – T. macrocalyx – T. macrocarpa – T. microphylla – T. montana – T. multiflora – T. pauciflora – T. petalocalyx – T. purpurea – T. pygmaea – T. quercifolia – T. rhynchocarpa – T. rugosa – T. sarotes – T. solanacea – T. stelligera – T. tenuivestita – T. tremandroides – T. triloba – T. triphylla

Nothospecies: T. x formosa
Name

Thomasia J.Gay, Mém. Mus. Hist. Nat. 7: 450. tt. 21, 22. (1821)

Type species: non design.

Synonyms

Heterotypic
Asterochiton Turcz.
Leucothamnus Lindl.
Rhynchostemon Steetz

References

Gay, J. 1821. Mémoires du Museum d'Histoire Naturelle 7: 450. tt. 21, 22.
Thomasia in: Australian Plant Census (APC) 2020. IBIS database, Centre for Australian National Biodiversity Research, Council of Heads of Australasian Herbaria. Accessed: 2020 Dec. 21.
Govaerts, R. et al. 2020. Thomasia in Kew Science Plants of the World online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2020 Dec. 21. Reference page.
International Plant Names Index. 2020. Thomasia. Published online. Accessed: Dec. 21 2020.
Tropicos.org 2020. Thomasia. Missouri Botanical Garden. Published online. Accessed: 21 Dec. 2020.

Thomasia is a genus of thirty-one species of flowering plants in the family Malvaceae. Plants in this genus are small shrubs that are endemic to the south-west of Western Australia, apart from P. petalocalyx that is native to Victoria and South Australia. The leaves are simple with leaf-like stipules at the base of the petiole, the flowers bisexual with five papery, petal-like sepals, usually five petals and five stamens opposite the petals. The fruit is a capsule covered with star-like hairs.[1][2][3]

Taxonomy

The genus Thomasia was first formally described in 1821 by Jaques Étienne Gay in Mémoires du Muséum d'Histoire Naturelle.[4][5] The name Thomasia honours Pierre Thomas, his son Abraham, and Abraham's sons Philippe, Louis and Emmanuel, a family of Swiss plant collectors.[5][6]
Species list

The following is a listed of Thomasia species recognised by the Australian Plant Census as at December 2020:[7]

Thomasia angustifolia Steud. - narrow-leaved thomasia
Thomasia brachystachys Turcz.
Thomasia cognata Steud.
Thomasia dielsii E.Pritz.
Thomasia discolor Steud.
Thomasia foliosa J.Gay
Thomasia × formosa Paust
Thomasia gardneri Paust - Mount Holland thomasia
Thomasia glabripetala S.J.Patrick
Thomasia grandiflora Lindl. - large-flowered thomasia
Thomasia macrocalyx Steud.
Thomasia macrocarpa Endl. - large-fruited thomasia
Thomasia microphylla Paust
Thomasia montana Steud. - hill thomasia
Thomasia multiflora E.Pritz.
Thomasia paniculata Lindl.
Thomasia pauciflora Lindl. - few-flowered thomasia
Thomasia petalocalyx F.Muell. - paper flower
Thomasia purpurea (Dryand.) J.Gay
Thomasia pygmaea (Turcz.) Benth. - tiny thomasia
Thomasia quercifolia (Andrews) J.Gay - oak-leaved thomasia
Thomasia rhynchocarpa Turcz.
Thomasia rugosa Turcz. - wrinkle-leaf thomasia
Thomasia rulingioides Steud.
Thomasia sarotes Turcz.
Thomasia solanacea (Sims) J.Gay
Thomasia stelligera (Turcz.) Benth.
Thomasia tenuivestita F.Muell.
Thomasia tremandroides Paust
Thomasia triloba Turcz.
Thomasia triphylla (Labill.) J.Gay

References

Short, Philip Sydney. "Thomasia". Royal Botanic Gardens Victoria. Retrieved 11 December 2020.
"Thomasia". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
"Thomasia". State Herbarium of South Australia. Retrieved 11 December 2020.
"Thomasia". APNI. Retrieved 11 December 2020.
Gay, Jaques E. (1821). "Monographie des Cinq Genres de Plantes, Lasiopétalées". Mémoires du Muséum d'Histoire Naturelle. 7: 450–452. Retrieved 11 December 2020.
Sharr, Francis Aubi; George, Alex (2019). Western Australian Plant Names and Their Meanings (3rd ed.). Kardinya, WA: Four Gables Press. p. 118. ISBN 9780958034180.
"Thomasia". Australian Plant Census. Retrieved 11 December 2020.

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