''Lasiopetalum longistamineum'' 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 a restricted area of New South Wales. It is a spreading shrub with its branches densely covered with woolly, rust-coloured hairs and has egg-shaped leaves and woolly-hairy flowers.

Description

''Lasiopetalum longistamineum'' is a spreading shrub that typically grows to a height of , its branches densely covered with woolly, rust-coloured hairs. The leaves are egg-shaped with a heart-shaped base and tapering tip, long and wide on a petiole long. The upper surface of the leaves is more or less glabrous and the lower surface is densely covered with white hairs, rust-coloured on the veins. The flowers are borne in spike-like groups with more or less egg-shaped, densely hairy bracteoles long below the base of 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. The sepals are oblong, about long, glabrous on the front and densely hairy on the back and there are no petals. The

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 ...

filaments are three times longer than the

anthers 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 filam ...

. Flowering occurs in spring.

Taxonomy

''Lasiopetalum longistamineum'' was first formally described in 1905 by

Joseph Maiden Joseph Henry Maiden (25 April 1859 – 16 November 1925) was a botanist who made a major contribution to knowledge of the Australian flora, especially the genus ''Eucalyptus''. This botanist is denoted by the author abbreviation when citing ...

and

Ernst Betche Daniel Ludwig Ernst Betche (31 December 1851, in Potsdam – 28 June 1913, in Sydney) was a German-Australian horticulturist and botanist. His mother died at his birth and he was of delicate constitution all his life. His father was sufficiently ...

in the ''

Proceedings of the Linnean Society of New South Wales The Linnean Society of New South Wales promotes ''the Cultivation and Study of the Science of Natural History in all its Branches'' and was founded in Sydney, New South Wales ( Australia) in 1874 and incorporated in 1884. History The Society suc ...

'' from specimens collected b
John Boorman
on Mount Dangar, near Gungal in 1904. 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 ...

(''longistamineum'') means "long stamen".

Distribution and habitat

This lasiopetalum grows in grassy woodland and dry rainforest and is restricted to the Gungal-Mount Dangar area between Merriwa and Muswellbrook in eastern New South Wales.

Conservation status

''Lasiopetalum longistamineum'' is listed as "vulnerable" under the Australian Government '' Environment Protection and Biodiversity Conservation Act 1999'' and the New South Wales Government '' Biodiversity Conservation Act 2016''.

References

{{Taxonbar, from=Q17580152 longistamineum Malvales of Australia Flora of New South Wales Plants described in 1905 Taxa named by Joseph Maiden Taxa named by Ernst Betche