Petrophile cyathiforma
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| Petrophile cyathiforma | |
|---|---|
 | |
| East of Gairdner | |
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Order: | Proteales |
| Family: | Proteaceae |
| Genus: | Petrophile |
| Species: | P. cyathiforma |
| Binomial name | |
| Petrophile cyathiforma | |
Petrophile cyathiforma is a species of flowering plant in the family Proteaceae and is endemic to southwestern Western Australia. It is a small shrub with needle-shaped, sharply-pointed leaves and cup-shaped heads of glabrous, bright yellow flowers.
Petrophile cyathiforma is a shrub that typically grows to a height of 30–65 cm (12–26 in) and has hairy young branchlets that become glabrous with age. The leaves are needle-shaped, sharply pointed and 10–15 mm (0.39–0.59 in) long. The flowers are arranged on the ends of branchlets in sessile, cup-shaped heads up to 15 mm (0.59 in) in diameter, with hairy, narrow egg-shaped involucral bracts at the base. The flowers are about 20 mm (0.79 in) long, bright yellow and glabrous. Flowering occurs from September to December and the fruit is a nut, fused with others in a hemispherical head up to 15–20 mm (0.59–0.79 in) in diameter with persistent bracts at the base.[2][3]
Taxonomy
Petrophile cyathiforma was first formally described in 1995 by Donald Bruce Foreman in Flora of Australia from material collected near Hyden in 1966.[4] The specific epithet (cyathiforma) means "cup-shaped", referring to shape of the flower head, as a result of the bracts at its base.[5]