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

Myrtaceae Myrtaceae, the myrtle family, is a family of dicotyledonous plants placed within the order Myrtales. Myrtle, pōhutukawa, bay rum tree, clove, guava, acca (feijoa), allspice, and eucalyptus are some notable members of this group. All speci ...

and is endemic to Western Australia. It is an erect shrub with upward pointing, egg-shaped leaves with the narrower end towards the base, and white or pink flowers with five petals and ten

stamen The stamen (plural ''stamina'' or ''stamens'') is the pollen-producing reproductive organ of a flower. Collectively the stamens form the androecium., p. 10 Morphology and terminology A stamen typically consists of a stalk called the filame ...

Description

''Thryptomene costata'' is an erect shrub that typically grows to a height of and has many branches from just above ground level. Its leaves are pointed upwards and egg-shaped with the narrower end towards the base, long and wide on a petiole long. The flowers are arranged in pairs in up to four adjacent leaf axils, on peduncles long with egg-shaped bracteoles long that fall from the flower buds. The flowers are in diameter with egg-shaped, white or pale pink sepals long. The petals are white to deep pink, long and there are ten stamens opposite the sepals and petals. Flowering occurs from May to November.

Taxonomy

''Thryptomene costata'' was first formally described in 2001 by Barbara Lynette Rye and

Malcolm Eric Trudgen Malcolm Eric Trudgen (born 1951) is a West Australian botanist. He has published some 105 botanical names. He currently runs his own consulting company, ''ME Trudgen and Associates''. He has worked in the Pilbara. Some publications * *. * * ...

in the journal '' Nuytsia'' from specimens collected by Trudgen in 1978. 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'') means "ribbed", referring to the

floral cup In angiosperms, a hypanthium or floral cup is a structure where basal portions of the calyx, the corolla, and the stamens form a cup-shaped tube. It is sometimes called a floral tube, a term that is also used for corolla tube and calyx tube. It ...

Distribution and habitat

This thryptomene grows on granite outcrops and other rocky places between Cue and Wubin and from Tallering Peak to near Menzies in the Avon Wheatbelt, Coolgardie, Murchison and Yalgoo

biogeographic regions A biogeographic realm or ecozone is the broadest biogeographic division of Earth's land surface, based on distributional patterns of terrestrial organisms. They are subdivided into bioregions, which are further subdivided into ecoregions. De ...

Conservation status

''Thryptomene costata'' is classified as "not threatened" by the Western Australian Government

Department of Parks and Wildlife The Department of Parks and Wildlife (DPaW) was the department of the Government of Western Australia responsible for managing lands described in the ''Conservation and Land Management Act 1984'' and implementing the state's conservation and e ...

References

{{Taxonbar, from=Q15388207 costata Endemic flora of Western Australia Rosids of Western Australia Plants described in 2001 Taxa named by Barbara Lynette Rye Taxa named by Malcolm Eric Trudgen