Yellow button
Scientific classification Edit this 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[3]

Homotypic

  • Helichrysum rupicola DC.

Heterotypic

  • Gnaphalium endeavourense Sch.Bip.
  • Gnaphalium rupicola Sch.Bip.
  • Helichrysum collinum DC.
  • Helichrysum rupicola var. danesii Domin

Coronidium rupicola, commonly known as the yellow button,[1] is a flowering plant in the family Asteraceae. It is a small, upright, perennial shrub with yellow flowers borne on a single stem and is endemic to Queensland, Australia.

Description

Coronidium rupicola is a small, shrubby, erect perennial 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 light-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 cypsela.[4]

Taxonomy

This species was first described in 1838 by Augustin Pyramus de Candolle as Helichrysum rupicola.[5] In 2008 Paul Graham Wilson published a paper titled "Coronidium, a new Australian genus in the Gnaphalieae (Asteraceae)", in which he erected the new genus Coronidium and transferred this species to it. It was published in the journal Nuytsia.[6][2]

Etymology

Wilson coined the genus name Coronidium from the Greek words korone (crown) and the diminutive -idion, a reference to a feature seen on the fruit after bristles have broken away from it.[6]: 301  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.[7]

Distribution and habitat

Yellow button is endemic to Queensland and grows on rocky coastlines, road verges, woodland and exposed ridges.[4][6]: 306 

References

  1. 1 2 "Species profile—Coronidium rupicola". Queensland Department of Environment and Science. Queensland Government. 2022. Retrieved 18 February 2023.
  2. 1 2 "Coronidium rupicola". Australian Plant Name Index (APNI). Centre for Plant Biodiversity Research, Australian Government. Retrieved 18 February 2023.
  3. 1 2 "Coronidium rupicola (DC.) Paul G.Wilson". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 18 February 2023.
  4. 1 2 Schaumann, M.; Barker, J.; Grieg, J. (1987). Australian Daisies. Sydney: Lothian Publishing. p. 142. ISBN 0850912911.
  5. ↑ "Helichrysum rupicola". Australian Plant Name Index. Retrieved 13 June 2023.
  6. 1 2 3 Wilson, P. (2008). "Coronidium, a new Australian genus in the Gnaphalieae (Asteraceae)" (PDF). Nuytsia. 18: 295–329. Retrieved 3 November 2023.
  7. ↑ George, A.S; Sharr, F.A (2021). Western Australian Plant Names and their meanings (4th ed.). Kardinya: Four Gables. p. 308. ISBN 9780958034197.
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