''Thomasia discolor'' is a species of flowering plant in the family

Malvaceae Malvaceae, or the mallows, is a family of flowering plants estimated to contain 244 genera with 4225 known species. Well-known members of economic importance include okra, cotton, cacao and durian. There are also some genera containing familiar ...

and is

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsew ...

to the

south-west The points of the compass are a set of horizontal, radially arrayed compass directions (or azimuths) used in navigation and cartography. A compass rose is primarily composed of four cardinal directions—north, east, south, and west—each se ...

of Western Australia. It is a multi-stemmed shrub with densely hairy branchlets, coarsely serrated, egg-shaped leaves with a heart-shaped base, and many small pink, cream-coloured or white flowers.

Description

''Thomasia discolor'' is a multistemmed shrub that typically grows to high, wide and has its branchlets densely covered with star-shaped hairs. The leaves are egg-shaped with a heart-shaped base, long and wide on a petiole long. The edges of the leaves are coarsely serrated, the lower surface paler than the upper surface and sparsely hairy. The flowers are arranged in

raceme A raceme ( or ) or racemoid is an unbranched, indeterminate type of inflorescence bearing flowers having short floral stalks along the shoots that bear the flowers. The oldest flowers grow close to the base and new flowers are produced as the s ...

s of 3 to 10 about long, each flower on a

pedicel Pedicle or pedicel may refer to: Human anatomy *Pedicle of vertebral arch, the segment between the transverse process and the vertebral body, and is often used as a radiographic marker and entry point in vertebroplasty and kyphoplasty procedures ...

long, with linear

bract In botany, a bract is a modified or specialized leaf, especially one associated with a reproductive structure such as a flower, inflorescence axis or cone scale. Bracts are usually different from foliage leaves. They may be smaller, larger, or of ...

s and sparsely hairy

bracteoles In botany, a bract is a modified or specialized leaf, especially one associated with a reproductive structure such as a flower, inflorescence axis or cone scale. Bracts are usually different from foliage leaves. They may be smaller, larger, or of ...

long at the base. The

sepal A sepal () is a part of the flower of angiosperms (flowering plants). Usually green, sepals typically function as protection for the flower in bud, and often as support for the petals when in bloom., p. 106 The term ''sepalum'' was coined b ...

s are pink, cream-coloured or white. Flowering occurs from May to November.

Taxonomy and naming

''Thomasia discolor'' was first formally described in 1821 by

Jaques Étienne Gay Jaques Étienne Gay (1786 in Switzerland – 1864) was a Swiss-French botanist, civil servant, collector and taxonomist. His name is associated with plants in standardised botanical nomenclature, e.g. ''Crocus sieberi'' J.Gay. He was the most fam ...

in the journal ''Mémoires du Muséum d'Histoire Naturelle'', from specimens collected at

Geographe Bay Geographe Bay is in the south-west of Western Australia around 220 km southwest of Perth. The bay was named in May 1801 by French explorer Nicolas Baudin, after his ship, ''Géographe''. The bay is a wide curve of coastline extending from ...

in 1801. The

specific epithet In taxonomy, binomial nomenclature ("two-term naming system"), also called nomenclature ("two-name naming system") or binary nomenclature, is a formal system of naming species of living things by giving each a name composed of two parts, bot ...

(''foliosa'') means "leafy".

Distribution and habitat

This thomasia grows in gravelly or granitic soil in shrubby understorey between Mogumber and

Stokes Inlet Stokes Inlet is an inlet in the Goldfields-Esperance region of Western Australia. The inlet is situated west of Esperance in Stokes National Park and is set is a large river valley with permanent deep water and high dunes located on either si ...

in the

Avon Wheatbelt The Avon Wheatbelt is a bioregion in Western Australia. It has an area of . It is considered part of the larger Southwest Australia savanna ecoregion. Geography The Avon Wheatbelt bioregion is mostly a gently undulating landscape with low reli ...

Esperance Plains Esperance Plains, also known as Eyre Botanical District, is a biogeographic region in southern Western Australia on the south coast between the Avon Wheatbelt and Hampton bioregions, and bordered to the north by the Mallee region. It is a pl ...

Geraldton Sandplains Geraldton (Wajarri: ''Jambinu'', Wilunyu: ''Jambinbirri'') is a coastal city in the Mid West region of the Australian state of Western Australia, north of the state capital, Perth. At June 2018, Geraldton had an urban population of 37,648. ...

Jarrah Forest Jarrah forest is tall open forest in which the dominant overstory tree is ''Eucalyptus marginata'' (jarrah). The ecosystem occurs only in the Southwest Botanical Province of Western Australia. It is most common in the biogeographic region named in ...

, Mallee,

Swan Coastal Plain The Swan Coastal Plain in Western Australia is the geographic feature which contains the Swan River as it travels west to the Indian Ocean. The coastal plain continues well beyond the boundaries of the Swan River and its tributaries, as a geol ...

and

Warren A warren is a network of wild rodent or lagomorph, typically rabbit burrows. Domestic warrens are artificial, enclosed establishment of animal husbandry dedicated to the raising of rabbits for meat and fur. The term evolved from the medieval Angl ...

bioregions of south-western Western Australia.

Conservation status

''Thomasia foliosa'' is listed as "not threatened" by the Western Australian Government

Department of Biodiversity, Conservation and Attractions The Department of Biodiversity, Conservation and Attractions (DBCA) is the Western Australian government The Government of Western Australia, formally referred to as His Majesty's Government of Western Australia, is the Australian state de ...

References

{{Taxonbar, from=Q17580969 Rosids of Western Australia Plants described in 1821 foliosa Taxa named by Jaques Étienne Gay