Stenanthemum bremerense

Priority Four — Rare Taxa (DEC)
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Rosales
Family: Rhamnaceae
Genus: Stenanthemum
Species:
S. bremerense
Binomial name
Stenanthemum bremerense

Stenanthemum bremerense is a species of flowering plant in the family Rhamnaceae and is endemic to the southwest of Western Australia. It is an erect, or low spreading shrub with hairy young stems, broadly egg-shaped leaves and densely hairy heads of tube-shaped flowers, sometimes with whitish floral leaves.

Description

Stenanthemum bremerense is an erect, or low, spreading shrub that typically grows to a height of 30–60 cm (12–24 in), its young stems densely covered with rust-coloured hairs. Its leaves are broadly egg-shaped with the narrower end towards the base, 3–9 mm (0.12–0.35 in) long and 2.5–5 mm (0.098–0.197 in) wide on a petiole 1.0–2.5 mm (0.039–0.098 in) long, with triangular stipules 2.3–4.0 mm (0.091–0.157 in) long at the base. The upper surface of the leaves is minutely pimply, and the lower surface is densely covered with greyish, star-shaped hairs. The leaves are mostly folded lengthwise. The flowers are densely hairy and borne in groups 3–15 mm (0.12–0.59 in) wide sometimes surrounded by whitish flower leaves. The floral tube is 1–2.2 mm (0.039–0.087 in) long and 1.0–1.4 mm (0.039–0.055 in) wide, the sepals 1.5–2.0 mm (0.059–0.079 in) long and the petals 0.6–0.9 mm (0.024–0.035 in) long. Flowering has been observed in May, June, October and November, and the fruit is 2.0–2.5 mm (0.079–0.098 in) long.[2][3]

Taxonomy and naming

Stenanthemum bremerense was first formally described in 2007 by Barbara Lynette Rye in the journal Nuytsia from specimens collected in 2004.[3][4] The specific epithet (bremerense) refers to the Bremer Range, as the species mainly occurs near it.[3]

Distribution and habitat

This species grows on laterite outcrops and breakaways near the Bremer Range and in a single location near Marvel Loch, in the Coolgardie bioregion of south-western Western Australia.[2][3][5]

Conservation status

Stenanthemum bremerense is listed as "Priority Four" by the Government of Western Australia Department of Biodiversity, Conservation and Attractions,[5] meaning that it is rare or near threatened.[6]

References

  1. ↑ "Stenanthemum bremerense". Australian Plant Census. Retrieved 2 December 2022.
  2. 1 2 Kellerman, Jurgen; Thiele, Kevin R. Kodela, Phillip G. (ed.). "Stenanthemum bremerense". Australian Biological Resources Study, Department of Agriculture, Water and the Environment: Canberra. Retrieved 2 December 2022.
  3. 1 2 3 4 Rye, Barbara L. (2007). "New species and keys for Cryptandra and Stenanthemum (Rhamnaceae) in Western Australia" (PDF). Nuytsia. 16 (2): 374–375. Retrieved 2 December 2022.
  4. ↑ "Stenanthemum bremerense". APNI. Retrieved 2 December 2022.
  5. 1 2 "Stenanthemum bremerense". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
  6. ↑ "Conservation codes for Western Australian Flora and Fauna" (PDF). Government of Western Australia Department of Parks and Wildlife. Retrieved 27 January 2023.
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