Hibbertia axillibarba is a species of flowering plant in the family Dilleniaceae and is endemic to a restricted area of the south-west of Western Australia. It is a shrub with crowded narrow oblong to linear leaves. Its yellow flowers are arranged singly on short side shoots with ten or eleven stamens fused at their bases on one side of the two densely hairy carpels.
| Hibbertia axillibarba | |
|---|---|
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Order: | Dilleniales |
| Family: | Dilleniaceae |
| Genus: | Hibbertia |
| Species: | H. axillibarba
|
| Binomial name | |
| Hibbertia axillibarba | |
Description
editHibbertia axillibarba is a shrub that typically grows to a height of 30–70 cm (12–28 in) with glabrous branchlets that are ridged below the petioles. Its leaves are crowded, angled upwards, narrow oblong to linear, 4–12 mm (0.16–0.47 in) long and 1–1.5 mm (0.039–0.059 in) wide on a petiole less than 0.5 mm (0.020 in) long and with a sharp point on the tip. The flowers are arranged singly in leaf axils on the ends of short side shoots with usually three narrow egg-shaped, sharply-pointed bracts 1.5–4 mm (0.059–0.157 in) long. The five sepals are elliptic, the outer sepals 4–6 mm (0.16–0.24 in) long and the inner ones 5–7 mm (0.20–0.28 in) long. The five petals are yellow, egg-shaped with the narrower end towards the base and 6.5–10 mm (0.26–0.39 in) long with a notch at the tip. There are ten or eleven stamens, fused at the base and all on one side of the two carpels that each contain two ovules. Flowering occurs from July to October.[2][3]
Taxonomy
editHibbertia axillibarba was first formally described in 2000 by Judith R. Wheeler in the journal Nuytsia from specimens she collected at South Ironcap, east of Hyden in 1999.[2][4] The specific epithet (axillibarba) is derived from Latin words meaning "an axil" and "a beard", referring to hairs in the leaf axils.[5]
Distribution and habitat
editThis hibbertia grows in heath and shrubland on laterite and is only known from near the type location.[2][3]
Conservation status
editGoodenia axillibarba is classified as "Priority One" by the Government of Western Australia Department of Parks and Wildlife,[3] meaning that it is known from only one or a few locations which are potentially at risk.[6]
See also
editReferences
edit- ^ "Hibbertia axillibarba". Australian Plant Census. Retrieved 6 April 2021.
- ^ a b c Wheeler, Judith R. (2000). "Review of Hibbertia mucronata and its allies (Dilleniaceae)". Nuytsia. 13 (2): 392–394. Retrieved 7 April 2021.
- ^ a b c "Hibbertia axillibarba". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
- ^ "Hibbertia axillibarba". APNI. Retrieved 6 April 2021.
- ^ Sharr, Francis Aubi; George, Alex (2019). Western Australian Plant Names and Their Meanings (3rd ed.). Kardinya, WA: Four Gables Press. p. 141. ISBN 9780958034180.
- ^ "Conservation codes for Western Australian Flora and Fauna" (PDF). Government of Western Australia Department of Parks and Wildlife. Retrieved 6 April 2021.