Petrophile canescens

Petrophile canescens, commonly known as conesticks,[2] is a species of flowering plant in the family Proteaceae and is endemic to eastern Australia. It is an erect shrub with pinnately-divided leaves and oval heads of hairy, white to pale cream-coloured flowers.

Conesticks
Petrophile canescens in the ANBG
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Proteales
Family: Proteaceae
Genus: Petrophile
Species:
P. canescens
Binomial name
Petrophile canescens
Synonyms[1]
  • Petrophila canescens R.Br. orth. var.
  • Petrophila pulchella var. canescens Domin orth. var.
  • Petrophile pulchella var. canescens (A.Cunn. ex R.Br.) Domin

Description

Petrophile canescens is an erect shrub that typically grows to a height of 0.5–3 m (1 ft 8 in–9 ft 10 in) and has branchlets and leaves that have silky grey hairs when young. The leaves are cylindrical, 30–110 mm (1.2–4.3 in) long on a petiole 20–50 mm (0.79–1.97 in) long and pinnately divided, the undivided part longer than the divided part. The flowers are arranged in sessile, oval heads 10–25 mm (0.39–0.98 in) long, sometimes in groups of up to four with hairy, triangular involucral bracts at the base. The flowers are 9–12 mm (0.35–0.47 in) long, white to pale cream-coloured and silky-hairy. Flowering occurs from September to January and the fruit is a nut, fused with others in an oval to spherical head 15–40 mm (0.59–1.57 in) long.[2][3]

This petrophile can be distinguished from the related Petrophile pulchella by its finely hairy new growth.[4]

Taxonomy

Petrophile canescens was first formally described in 1830 by Robert Brown from an unpublished description by Allan Cunningham. Brown's description was published in the Supplementum to his Prodromus Florae Novae Hollandiae et Insulae Van Diemen.[5][6] The specific epithet (canescens) means "becoming or being somewhat white or hoary".[7]

Distribution and habitat

Conesticks grows in forest and sandy heath on the Blackdown Tableland in Queensland and south to Nerriga and as far west as Warialda in New South Wales.[2][3]

References
  1. "Petrophile canescens". Australian Plant Census. Retrieved 3 December 2020.
  2. Harden, Gwen J. "Petrophile canescens". Royal Botanic Garden Sydney. Retrieved 3 December 2020.
  3. Foreman, David B. "Petrophile canescens". Australian Biological Resources Study, Department of Agriculture, Water and the Environment: Canberra. Retrieved 4 December 2020.
  4. Harden, Gwen J. "New South Wales Flora Online: Genus Petrophile". Sydney, Australia: Royal Botanic Gardens & Domain Trust. Retrieved 30 November 2011.
  5. "Persoonia canescens". APNI. Retrieved 4 December 2020.
  6. Brown, Robert (1830). Supplementum primum prodromi florae Novae Hollandiae. New York: H.R. Engelmann, Wheldon & Wesley. p. 6. Retrieved 4 December 2020.
  7. Sharr, Francis Aubi; George, Alex (2019). Western Australian Plant Names and Their Meanings (3rd ed.). Kardinya, WA: Four Gables Press. p. 157. ISBN 9780958034180.
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