Deua grevillea
Grevillea rhyolitica
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Proteales
Family: Proteaceae
Genus: Grevillea
Species:
G. rhyolitica
Binomial name
Grevillea rhyolitica
Synonyms

Grevillea sp. aff. victoriae 'B'

Grevillea rhyolitica, commonly known as Deua grevillea or Deua flame,[2] is a species of flowering plant in the family Proteaceae and is endemic to south-eastern New South Wales. It is a more or less erect shrub with elliptic leaves and hairy red flowers.

Description

Grevillea rhyolitica is usually a more or less erect shrub that typically grows to a height of 0.5–2 m (1 ft 8 in – 6 ft 7 in). Its leaves are elliptic, 40–110 mm (1.6–4.3 in) long and 10–25 mm (0.39–0.98 in) wide, the upper surface mostly glabrous and the lower surface sparsely hairy. The flowers are arranged on the ends of branches or in leaf axils near the ends of branches, in down-curved, oval to more or less spherical clusters of mostly 5 to 18 on a rachis 10–20 mm (0.39–0.79 in) long. The clusters are on a thin, wiry peduncle 15–20 mm (0.59–0.79 in) long, each flower on a pedicel 2–4 mm (0.079–0.157 in) long. The flowers are red and densely hairy except at the base, the pistil 16–20 mm (0.63–0.79 in) long. Flowering occurs from September to December, and the fruit is a glabrous follicle 18–22 mm (0.71–0.87 in) long with several longitudinal ridges.[2][3][4]

Taxonomy

Grevillea rhyolitica was first formally described in 1997 by Robert Owen Makinson in the journal Telopea from specimens collected in 1990 by David Albrecht.[4][5] The specific epithet (rhyolitica) refers to the usual occurrence of this species on outcrops of rhyolite rock.[4]

In 2000, Makinson described two subspecies of G. rhyolitica in the Flora of Australia, and the names are accepted by the Australian Plant Census:

  • Grevillea rhyolitica Makinson subsp. rhyolitica[6] has leaves with raised hairs on the lower surface.[7][8]
  • Grevillea rhyolitica subsp. semivestita Makinson[9] has leaves with scattered hairs pressed against the lower surface.[10][11]

Distribution and habitat

Subspecies rhyolitica of Deua grevillea grows in moist gullies and in steep rocky ridges on rhyolite in montane areas west and south-west of Moruya[7][8] and subspecies semivestita grows forest in broken escarpment country north-west of Moruya in south-eastern New South Wales.[10][11]

References

  1. ↑ "Grevillea rhyolitica". Australian Plant Census. Retrieved 23 December 2022.
  2. 1 2 Makinson, Robert O. "Grevillea rhyolitica". Royal Botanic Garden Sydney. Retrieved 23 December 2022.
  3. ↑ "Grevillea rhyolitica". Australian Biological Resources Study, Department of Agriculture, Water and the Environment: Canberra. Retrieved 23 December 2022.
  4. 1 2 3 Makinson, Robert O. (1997). "New segregate species and subspecies from the Grevillea victoriae (Proteaceae: Grevilleoideae) aggregate from south-east New South Wales". Telopea. 7 (2): 134–136. Retrieved 23 December 2022.
  5. ↑ "Grevillea rhyolitica". APNI. Retrieved 23 December 2022.
  6. ↑ "Grevillea rhyolitica subsp. rhyolitica". Australian Plant Census. Retrieved 23 December 2022.
  7. 1 2 Makinson, Robert O. "Grevillea rhyolitica subsp. rhyolitica". Royal Botanic Garden Sydney. Retrieved 23 December 2022.
  8. 1 2 "Grevillea rhyolitica subsp. rhyolitica". Australian Biological Resources Study, Department of Agriculture, Water and the Environment: Canberra. Retrieved 23 December 2022.
  9. ↑ "Grevillea rhyolitica subsp. semivestita". Australian Plant Census. Retrieved 23 December 2022.
  10. 1 2 Makinson, Robert O. "Grevillea rhyolitica subsp. semivestita". Royal Botanic Garden Sydney. Retrieved 23 December 2022.
  11. 1 2 "Grevillea rhyolitica subsp. semivestita". Australian Biological Resources Study, Department of Agriculture, Water and the Environment: Canberra. Retrieved 23 December 2022.
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