Grevillea wickhamii

Grevillea wickhamii, commonly known as Wickham's grevillea,[2] holly-leaf grevillea or lgarrmari in Djaru,[3] is species of flowering plant in the family Proteaceae and is endemic to northern Australia. It is an erect shrub or spindly tree with holly-like, broadly egg-shaped leaves with 2 to 7 shallow teeth, and down-curved clusters of flowers, the colour depending on subspecies.

Grevillea wickhamii
Subspecies aprica
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Proteales
Family: Proteaceae
Genus: Grevillea
Species:
G. wickhamii
Binomial name
Grevillea wickhamii
Habit
Foliage and fruit, subsp. aprica

Description

Grevillea wickhamii is an erect shrub or spindly tree, that typically grows to a height of 1–6 m (3 ft 3 in – 19 ft 8 in) and has smooth bark. Its leaves are holly-like, broadly egg-shaped in outline, 30–90 mm (1.2–3.5 in) long and 25–55 mm (0.98–2.17 in) wide, with 2 to 7 shallow, pointed teeth near the tip of the leaves. The flowers are arranged in leaf axils or on the stems in down-curved, sometimes branched clusters, the end groups on a rachis mostly 10–70 mm (0.39–2.76 in) long, each flower on a pedicel usually 2–6 mm (0.079–0.236 in) long. Flower colour and flowering period vary with subspecies, and the pistil is 5–10 mm (0.20–0.39 in) long. The fruit is an oblong, glabrous follicle 10–20 mm (0.39–0.79 in) long.[2][4][5]

Taxonomy

Grevillea wickhamii in 1856 by Carl Meissner in de Candolle's Prodromus Systematis Naturalis Regni Vegetabilis from specimens collected by John Clements Wickham of plants he collected in northern Australia during the Second voyage of HMS Beagle.[6][7] The specific epithet (wickhamii) honours the collector of the type specimens.[8]

The names of 6 subspecies of G. wickhamii are accepted by the Australian Plant Census:

  • Grevillea wickhamii subsp. aprica McGill.[9] flowers in most months, with a peak from May to August, and has red or orange flowers.[10][11][12]
  • Grevillea wickhamii subsp. cratista Makinson[13] flowers in July, and has red to deep pink flowers.[14][15]
  • Grevillea wickhamii subsp. hispidula Makinson[16] flowers from May to August, and has yellow or bright red flowers.[17][18]
  • Grevillea wickhamii subsp. macrodonta Makinson[19] flowers in December and from April to August, and has red to deep orange or yellow flowers, with a yellow style.[20][21]
  • Grevillea wickhamii subsp. pallida Makinson[22] flowers in December and from May to June, and has lemon yellow flowers, with a pale yellow style.[23][24]
  • Grevillea wickhamii Meisn. subsp. wickhamii[25] flowers from April to August, and has red flowers, with a yellow style.[26][27]

Distribution and habitat

Wickham's grevillea is widespread in northern Western Australia, in inland regions of the Northern Territory and in western Queensland.[2][4]

Conservation status

All 6 subspecies of G. wickhamii are listed as "not threatened" by the Government of Western Australia Department of Biodiversity, Conservation and Attractions.[11][15][18][21][24][27]

References

  1. "Grevillea wickhamii". Australian Plant Census. Retrieved 18 April 2023.
  2. "Grevillea wickhamii". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
  3. "Grevillea wickhamii". Northern Territory Government. Retrieved 18 April 2023.
  4. "Grevillea wickhamii". Australian Biological Resources Study, Department of Agriculture, Water and the Environment: Canberra. Retrieved 19 April 2023.
  5. Wrigley, John W.; Fagg, Murray A. (1991). Banksias, waratahs & grevilleas : and all other plants in the Australian Proteaceae family. North Ryde, NSW, Australia: Angus & Robertson. p. 349. ISBN 0207172773.
  6. "Grevillea wickhamii". APNI. Retrieved 19 April 2023.
  7. Meissner, Carl; de Candolle, Augustin P. (1857). Prodromus Systematis Naturalis Regni Vegetabilis. Paris. p. 380. Retrieved 18 April 2023.{{cite book}}: CS1 maint: location missing publisher (link)
  8. Sharr, Francis Aubi; George, Alex (2019). Western Australian Plant Names and Their Meanings (3rd ed.). Kardinya, WA: Four Gables Press. p. 339. ISBN 9780958034180.
  9. "Grevillea wickhamii subsp. aprica". Australian Plant Census. Retrieved 19 April 2023.
  10. "Grevillea wickhamii subsp. aprica". Australian Biological Resources Study, Department of Agriculture, Water and the Environment: Canberra. Retrieved 19 April 2023.
  11. "Grevillea wickhamii subsp. aprica". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
  12. "Grevillea wickhamii subsp. aprica". Northern Territory Government. Retrieved 19 April 2023.
  13. "Grevillea wickhamii subsp. cratista". Australian Plant Census. Retrieved 19 April 2023.
  14. "Grevillea wickhamii subsp. cratista". Australian Biological Resources Study, Department of Agriculture, Water and the Environment: Canberra. Retrieved 19 April 2023.
  15. "Grevillea wickhamii subsp. cratista". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
  16. "Grevillea wickhamii subsp. hispidula". Australian Plant Census. Retrieved 19 April 2023.
  17. "Grevillea wickhamii subsp. hispidula". Australian Biological Resources Study, Department of Agriculture, Water and the Environment: Canberra. Retrieved 19 April 2023.
  18. "Grevillea wickhamii subsp. hispidula". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
  19. "Grevillea wickhamii subsp. macrodonta". Australian Plant Census. Retrieved 19 April 2023.
  20. "Grevillea wickhamii subsp. macrodonta". Australian Biological Resources Study, Department of Agriculture, Water and the Environment: Canberra. Retrieved 19 April 2023.
  21. "Grevillea wickhamii subsp. macrodonta". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
  22. "Grevillea wickhamii subsp. pallida". Australian Plant Census. Retrieved 19 April 2023.
  23. "Grevillea wickhamii subsp. pallida". Australian Biological Resources Study, Department of Agriculture, Water and the Environment: Canberra. Retrieved 19 April 2023.
  24. "Grevillea wickhamii subsp. pallida". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
  25. "Grevillea wickhamii subsp. wickhamii". Australian Plant Census. Retrieved 19 April 2023.
  26. "Grevillea wickhamii subsp. wickhamii". Australian Biological Resources Study, Department of Agriculture, Water and the Environment: Canberra. Retrieved 19 April 2023.
  27. "Grevillea wickhamii subsp. wickhamii". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
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