''Daviesia costata'' is a species of flowering plant in the family

Fabaceae The Fabaceae or Leguminosae,International Code of Nomenc ...

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 of Western Australia. It is a straggling, multi-stemmed shrub with scattered, erect, linear

phyllode Phyllodes are modified petioles or leaf stems, which are leaf-like in appearance and function. In some plants, these become flattened and widened, while the leaf itself becomes reduced or vanishes altogether. Thus the phyllode comes to serve the ...

s, and yellow and dark red flowers.

Description

''Daviesia costata'' is a straggling, multi-stemmed,

glabrous Glabrousness (from the Latin ''glaber'' meaning "bald", "hairless", "shaved", "smooth") is the technical term for a lack of hair, down, setae, trichomes or other such covering. A glabrous surface may be a natural characteristic of all or part of ...

shrub that typically grows up to high and wide. Its leaves are reduced to scattered, erect, linear phyllodes long and wide, with a prominent mid-rib. The flowers are arranged mostly in groups of three to eight in upper leaf axils on a peduncle 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 sticky

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 about 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 long and joined at the base with five purple-tinged lobes. The

standard Standard may refer to: Symbols * Colours, standards and guidons, kinds of military signs * Standard (emblem), a type of a large symbol or emblem used for identification Norms, conventions or requirements * Standard (metrology), an object th ...

is yellow with a dark red base, egg-shaped, deeply notched, about long and wide. The

wings A wing is a type of fin that produces lift while moving through air or some other fluid. Accordingly, wings have streamlined cross-sections that are subject to aerodynamic forces and act as airfoils. A wing's aerodynamic efficiency is expresse ...

and

keel The keel is the bottom-most longitudinal structural element on a vessel. On some sailboats, it may have a hydrodynamic and counterbalancing purpose, as well. As the laying down of the keel is the initial step in the construction of a ship, in Br ...

are dark red and about long. Flowering mainly occurs in September and October and the fruit is a flattened, triangular pod long.

Taxonomy

''Davieia costata'' was first formally described in 1920 by

Edwin Cheel Edwin Cheel (14 February 1872 – 19 September 1951) was an Australian botanist and collector. Before being appointed as a staff member of Centennial Park in 1897 he was a gardener in New South Wales and Queensland. Later he transferred to the R ...

in the '' Journal and Proceedings of the Royal Society of Western Australia'' based on specimens collected by

Max Koch Maxwell "Max" Koch (17 July 1854 – 1 April 1925) was a German-born Australian botanical collector. Biography Born in Berlin, Koch was apprenticed to a merchant's office, but, not liking the work, joined the crew of a Glasgow-based sailing sh ...

"at Queenswood, on the Preston Valley Railway". 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 ...

(''costata'') mean "ribbed", referring to the stems.

Distribution and habitat

This daviesia usually grows in open forest on sandy soil on flat and sloping sites between Toodyay and the

Blackwood River The Blackwood River is a major river and catchment in the South West of Western Australia. Course The river begins at the junction of Arthur River and Balgarup River near Quelarup and travels in a south westerly direction through the tow ...

on the

Darling Range The Darling Scarp, also referred to as the Darling Range or Darling Ranges, is a low escarpment running north–south to the east of the Swan Coastal Plain and Perth, Western Australia. The escarpment extends generally north of Bindoon, to th ...

to Corrigin and Katanning, 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 ...

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 ...

and

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 ...

biogeographic regions of south-western Western Australia.

Conservation status

''Daviesia costata'' is listed as "not threatened" by the

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=Q15532514 costata Rosids of Western Australia Plants described in 1920 Taxa named by Edwin Cheel