''Hibbertia marginata'', commonly known as bordered guinea flower, is a species of flowering plant in the family Dilleniaceae and is endemic to the

North Coast North Coast or Northcoast may refer to : Antigua and Barbuda * Major Division of North Coast, a census division in Saint John Parish Australia *New South Wales North Coast, a region Canada *The British Columbia Coast, primarily the communiti ...

of New South Wales. It is a spreading shrub with hairy young branches, oblong to lance-shaped leaves and yellow flowers with thirty to forty

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 ...

s and many

staminode In botany, a staminode is an often rudimentary, sterile or abortive stamen, which means that it does not produce pollen.Jackson, Benjamin, Daydon; ''A Glossary of Botanic Terms with their Derivation and Accent''; Published by Gerald Duckworth & Co. ...

s arranged around three hairy

carpels Gynoecium (; ) is most commonly used as a collective term for the parts of a flower that produce ovules and ultimately develop into the fruit and seeds. The gynoecium is the innermost whorl of a flower; it consists of (one or more) ''pistils'' ...

Description

''Hibbertia marginata'' is a spreading shrub that typically grows to a height of with finely hairy, wiry young branches and that forms suckers. The leaves are more or less oblong to lance-shaped, sometimes with the narrower end towards the base, long, wide on a petiole long. The flowers are arranged on the ends of branchlets, in diameter, and sessile with leaf-like

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. The sepals are hairy, long, the outer sepals usually longer than the inner ones. The petals are yellow, egg-shaped with the narrower end towards the base, long with thirty to fifty stamens and many staminodes arranged around three hairy carpels, each carpel with six ovules. Flowering occurs in September and October.

Taxonomy

''Hibbertia marginata'' was first formally described in 1990 by

Barry Conn Barry John Conn (Barry Conn, born 1948), is an Australian botanist. He was awarded a Ph.D. from Adelaide University in 1982 for work on ''Prostanthera''. Career Conn's first appointment as a botanist was with the Lae Herbarium in 1974. He ...

in the journal '' Muelleria'' from specimens collected in 1987.

Distribution and habitat

Bordered guinea flower grows in the grassy understorey of forest in the

Richmond Range Richmond most often refers to: * Richmond, Virginia, the capital of Virginia, United States * Richmond, London, a part of London * Richmond, North Yorkshire, a town in England * Richmond, British Columbia, a city in Canada * Richmond, California, a ...

of north-eastern New South Wales.

Conservation

This hibbertia is classified as "vulnerable" under the Australian Government '' Environment Protection and Biodiversity Conservation Act 1999'' and the New South Wales Government '' Biodiversity Conservation Act 2016''. The main threats to the species are land clearing, road maintenance and inappropriate fire regimes. This was one of eleven species selected for the Save a Species Walk campaign in April 2016; scientists walked 300 km to raise money for collection of seeds to be prepared and stored at the Australian PlantBank at the Australian Botanic Garden, Mount Annan.

References

{{Taxonbar, from=Q17395264 marginata Flora of New South Wales Plants described in 1990 Taxa named by Barry John Conn