Spyridium tricolor

Priority Two — Poorly Known Taxa (DEC)
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Rosales
Family: Rhamnaceae
Genus: Spyridium
Species:
S. tricolor
Binomial name
Spyridium tricolor

Spyridium tricolor is a species of flowering plant in the family Rhamnaceae and is endemic to southern continental Australia. It is an erect shrub with broadly elliptic to round leaves, and dense clusters of densely woolly-hairy, cream-coloured flowers.

Description

Spyridium tricolor is an erect, dense, rounded, densely hairy shrub that typically grows to a height of 0.3–1.5 m (1 ft 0 in – 4 ft 11 in). Its leaves are broadly elliptic to round, 8–13 mm (0.31–0.51 in) long and 7.5–12 mm (0.30–0.47 in) wide on a petiole 3–5 mm (0.12–0.20 in) long, with egg-shaped stipules 3–5.5 mm (0.12–0.22 in) long at the base. The flowers are cream-coloured, densely woolly-hairy and borne on the ends of branches in up to 3 clusters of 12 to 20 flowers on a branched rachis. Each cluster is surrounded by overlapping, broadly egg-shaped involucral bracts 4–6 mm (0.16–0.24 in) long, with a single cream-coloured leaf like bract. The floral tube is 1.2–1.5 mm (0.047–0.059 in) long, the sepals egg-shaped and 1.0–1.3 mm (0.039–0.051 in) long, and both are densely covered with white hairs. Flowering occurs throughout the year.[2][3]

Taxonomy

Spyridium tricolor was first formally described in 1993 by William Robert Barker and Barbara Lynette Rye in the Journal of the Adelaide Botanic Gardens from specimens collected by Paul G. Wilson, near Point Dover on the Great Australian Bight in 1967.[2][4] The specific epithet (tricolor) means "three-coloured", referring to the leaves, pale to mid-green on the upper surface, rust-coloured at first, later grey on the lower surface.[2]

Distribution and habitat

This spyridium grows in sandy soil with limestone, often in mallee shrubland between Cape Arid National Park and Eyre in Western Australia, and disjunctly near Ceduna in South Australia.[2][3][5]

Conservation status

Spyridium tricolor is listed as "not threatened" by the Western Australian Government Department of Biodiversity, Conservation and Attractions.[3]

References

  1. ↑ "Spyridium tricolor". Australian Plant Census. Retrieved 15 November 2022.
  2. 1 2 3 4 Barker, William R.; Rye, Barbara L. (1993). "Spyridium tricolor (Rhamnaceae), a disjunct new species from the Great Australian Bight". Journal of the Adelaide Botanic Gardens. 15 (2): 153–157. Retrieved 15 November 2022.
  3. 1 2 3 "Spyridium tricolor". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
  4. ↑ "Spyridium tricolor". Australian Plant Name Index. Retrieved 15 November 2022.
  5. ↑ Rye, Barbara L. (1996). "A synopsis of the genera Pomaderris, Siegfriedia, Spyridium and Trymalium (Rhamnaceae) in Western Australia". Nuytsia. 11 (1): 124. Retrieved 15 November 2022.
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