''Asterolasia asteriscophora'', commonly known as lemon starbush, is a species of slender, erect shrub in the family

Rutaceae The Rutaceae is a family, commonly known as the rueRUTACEAE
in BoDD – Botanical Derm ...

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 southern continental Australia. It has woolly, star-shaped hairs on its young branches, variably-shaped leaves covered with brownish or whitish hairs on the underside, and yellow flowers with woolly brown, star-shaped hairs on the back.

Description

''Asterolasia asteriscophora'' is a slender, erect shrub that typically grows to a height of with its young branches covered with woolly, grey to brown star-shaped hairs. The leaves are spatula-shaped, egg-shaped, wedge-shaped or elliptic, long and wide on a short petiole. The upper surface of the leaves is more or less

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 ...

and the lower surface is covered with woolly, brownish or whitish hairs. The flowers are arranged singly or in small groups in leaf

axil A leaf ( : leaves) is any of the principal appendages of a vascular plant stem, usually borne laterally aboveground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", while the leaves, st ...

s or on the ends of branchlets on

pedicels In botany, a pedicel is a stem that attaches a single flower to the inflorescence. Such inflorescences are described as ''pedicellate''. Description Pedicel refers to a structure connecting a single flower to its inflorescence. In the absenc ...

long. The

petal Petals are modified Leaf, leaves that surround the reproductive parts of flowers. They are often advertising coloration, brightly colored or unusually shaped to attract pollinators. All of the petals of a flower are collectively known as the ''c ...

s are yellow, rarely white, long and covered with woolly brown star-shaped hairs on the back. Flowering occurs in spring.

Taxonomy

This species was first described in 1855 by

Ferdinand von Mueller Baron Sir Ferdinand Jacob Heinrich von Mueller, (german: Müller; 30 June 1825 – 10 October 1896) was a German-Australian physician, geographer, and most notably, a botanist. He was appointed government botanist for the then colony of Vict ...

who gave it the name ''Phebalium asteriscophora'' and published the description in ''Transactions and Proceedings of the Victorian Institute for the Advancement of Science''. In 1917

George Claridge Druce George Claridge Druce, MA, LLD, JP, FRS, FLS (23 May 1850 – 29 February 1932) was an English botanist and a Mayor of Oxford. Personal life and education G. Claridge Druce was born at Potterspury on Watling Street in Northamptonshire. ...

changed the name to ''Asterolasia asteriscophora''. In 2002, Bryan J. Mole described two subspecies and the names have been accepted by the

Australian Plant Census The Australian Plant Census (APC) provides an online interface to currently accepted, published, scientific names of the vascular flora of Australia, as one of the output interfaces of the national government Integrated Biodiversity Information Syst ...

: * ''Asterolasia asteriscophora'' subsp. ''albiflora'' that has white, rarely pale lemon-coloured petals with smaller leaves and flowers that the

autonym Autonym may refer to: * Autonym, the name used by a person to refer to themselves or their language; see Exonym and endonym * Autonym (botany), an automatically created infrageneric or infraspecific name See also * Nominotypical subspecies, in zo ...

; * ''Asterolasia asteriscophora'' subsp. ''asteriscophora'' that has bright yellow petals up to long and leaves mostly longer than .

Distribution and habitat

''Asterolasia asteriscophora'' is widely distributed along the

Great Dividing Range The Great Dividing Range, also known as the East Australian Cordillera or the Eastern Highlands, is a cordillera system in eastern Australia consisting of an expansive collection of mountain ranges, plateaus and rolling hills, that runs rough ...

from the

Tumut Tumut () is a town in the Riverina region of New South Wales, Australia, situated on the banks of the Tumut River. Tumut sits on the north-west foothills of the Snowy Mountains and is located on the traditional lands of the Wiradjuri, Wolgalu ...

district in New South Wales to the

Macedon Macedonia (; grc-gre, Μακεδονία), also called Macedon (), was an ancient kingdom on the periphery of Archaic and Classical Greece, and later the dominant state of Hellenistic Greece. The kingdom was founded and initially ruled by ...

and

Emerald Emerald is a gemstone and a variety of the mineral beryl (Be3Al2(SiO3)6) colored green by trace amounts of chromium or sometimes vanadium.Hurlbut, Cornelius S. Jr. and Kammerling, Robert C. (1991) ''Gemology'', John Wiley & Sons, New York, p ...

districts in Victoria. It grows in forest and along the eges of watercourses. Subspecies ''albiflora'' is only known from the Emerald- Avonsleigh and is threatened by urban development.

References

{{Taxonbar, from=Q4810765 asterisocphora Flora of Victoria (Australia) Sapindales of Australia Flora of New South Wales Plants described in 1855 Taxa named by Ferdinand von Mueller