Calocephalus Knappii
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''Calocephalus knappii'', is a species of flowering plant in the family
Asteraceae Asteraceae () is a large family (biology), family of flowering plants that consists of over 32,000 known species in over 1,900 genera within the Order (biology), order Asterales. The number of species in Asteraceae is rivaled only by the Orchi ...
. It is a small annual herb with yellow globular-shape flowers upright to decumbent branches and is
endemic Endemism is the state of a species being found only 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 foun ...
to Australia.


Description

''Calocephalus knappii'' is an annual herb with decumbent or upright habit with branches about long. The leaves are arranged alternate, oval to lance-shaped or linear to elliptic, long, spreading to pressed against the stem, wide, occasional to thickly hairy and a prominent mid vein. The flower heads are oblong, rounded, globular or ovoid, about in diameter, orange or yellowish brown, each head has about 20-70 florets, outer
bract In botany, a bract is a modified or specialized leaf, associated with a reproductive structure such as a flower, inflorescence axis or cone scale. Bracts are usually different from foliage leaves in size, color, shape or texture. They also lo ...
s mostly green, opaque and the corolla tube long. Flowering occurs from July to October and the fruit is an
achene An achene (; ), also sometimes called akene and occasionally achenium or achenocarp, is a type of simple fruit, simple dry fruits, dry fruit produced by many species of flowering plants. Achenes are monocarpellate (formed from one carpel) and Dehi ...
about long, about in diameter, brown and bristly.


Taxonomy and naming

''Calcephalus knappii'' was first formally described in 1910 by
Ewart Ewart is both a given name and a surname. Notable people with the name include: Given name * Ewart Adamson (1882–1945), Scottish screenwriter * Ewart Astill (1888–1948), English Test cricketer * Ewart Brown (born 1946), Premier of Bermuda * Ew ...
& Jean White from an unpublished description by
Ferdinand von Mueller Baron Sir Ferdinand Jacob Heinrich von Mueller, (; 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 Victoria, Australia ...
and the description was published in ''
Proceedings of the Royal Society of Victoria The Royal Society of Victoria (RSV) is the oldest scientific society in Victoria, Australia. Foundation In 1854 two organisations formed with similar aims and membership, these being the Victorian Institute for the Advancement of Science (found ...
''. The
specific epithet In Taxonomy (biology), taxonomy, binomial nomenclature ("two-term naming system"), also called binary nomenclature, is a formal system of naming species of living things by giving each a name composed of two parts, both of which use Latin gramm ...
(''knappii'') is in honour of Austrian botanist
Joseph Armin Knapp Joseph is a common male name, derived from the Hebrew (). "Joseph" is used, along with " Josef", mostly in English, French and partially German languages. This spelling is also found as a variant in the languages of the modern-day Nordic count ...
.


Distribution and habitat

This species grows in South Australia, Western Australia, Queensland and the Northern Territory on sand, sandy clay and near drainage channels.


References

Gnaphalieae Asterales of Australia Flora of Western Australia Flora of Queensland Flora of the Northern Territory {{Australia-asterid-stub