Coronidium rupicola
From Wikipedia, the free encyclopedia
| Yellow button | |
|---|---|
 | |
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Genus: | Coronidium |
| Species: | C. rupicola |
| Binomial name | |
| Coronidium rupicola | |
| Synonyms[2] | |
Coronidium rupicola, commonly known as yellow button,[3] is a species of flowering plant in the family Asteraceae and is endemic to Queensland, Australia. It is a small, upright, perennial herb with lance-shaped stem leaves, heads of yellow flowers with bronze-coloured bracts, and cylindrical to oblong cypselas with thread-like pappus bristles.
Coronidium rupicola is a small, shrubby, erect perennial herb with a single stem and terminal yellow button flower-heads about 2 cm (0.79 in) in diameter. Unlike other species of Coronidium it doesn't have conspicuous, large bracts, instead a ring of smaller, narrow bronze-coloured bracts. The florets are thickly crowded with a greenish centre. The flowers in bud are thickly covered with long, whitish hairs, new growth stems silvery and woolly. The leaves are narrow, lanceolate, 5 cm (2.0 in) long, pale green, densely woolly underneath, upper surface smooth, margins rolled under and wavy. Flowering occurs throughout the year and the fruit is a cylindrical to oblong cypsela with thread-like pappus bristles.[3][4][5]
Taxonomy
This species was first described in 1838 by Augustin Pyramus de Candolle who gave it the name Helichrysum rupicola in his Prodromus Systematis Naturalis Regni Vegetabilis.[6][7] In 2008, Paul Graham Wilson transferred the species to Coronidium as C. rupicola in the journal Nuytsia.[8][4] The specific epithet (rupicola) is derived from the Latin words rūpēs meaning "cliff", and -cola meaning "to inhabit", and is a reference to the habitat where this species is found.[9]
Distribution and habitat
Yellow button is endemic to Queensland and grows on rocky coastlines, road verges, woodland and exposed ridges.[3]
