Hoya macgillivrayi

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Hoya macgillivrayi
Hoya macgillivrayi by Scott Zona - 003.jpg
Rare (NCA)
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Gentianales
Family: Apocynaceae
Genus: Hoya
Species:
H. macgillivrayi
Binomial name
Hoya macgillivrayi

Hoya macgillivrayi, commonly known as red hoya or Macgillivray's wax flower, [2] is a species of vine endemic to Cape York Peninsula in Queensland, and has egg-shaped to lance-shaped leaves and racemes of dark reddish-pink flowers, sometimes with a white centre, and a reddish-pink corona.

Contents

Description

Hoya macgillivrayi is a vine with stems less than 20 mm (0.79 in) in diameter and containing white, milky sap. Its leaves are glabrous, egg-shaped to lance-shaped, up to 200 mm (7.9 in) long and to 80 mm (3.1 in) wide with two to five colleters. The flowers are fleshy, glabrous, flattened bell-shaped, dark reddish-pink, sometimes with a white centre, 55–80 mm (2.2–3.1 in) in diameter with six to ten flowers. Each flower is on a pedicel 54–85 mm (2.1–3.3 in) long and has narrowly oblong lobes 20–25 mm (0.79–0.98 in) long and 19–23 mm (0.75–0.91 in) wide with the edges curved down. The corona has linear lobes 10–12 mm (0.39–0.47 in) long and 2–3 mm (0.079–0.118 in) wide and reddish-pink. Flowering occurs from May to October and the fruit is a follicle about 250 mm (9.8 in) long and 16 mm (0.63 in) wide. [3] [4] [5] [6]

Taxonomy

Hoya macgillivrayi was first formally described in 1914 by Frederick Manson Bailey in the Queensland Agricultural Journal from specimens collected by William MacGillivray near "Claudie River, Lloyd Bay". [7] [8] The specific epithet (macgillivrayi) honours the collector of the type specimens. [6]

Distribution and habitat

This species of Hoya grows in rainforest and monsoon forest in the Iron and McIlwraith Ranges on Cape York Peninsula, from sea level to 450 m (1,480 ft). [4] [6]

Conservation status

Hoya macgillivrayi is listed as "near threatened" under the Queensland Government Nature Conservation Act 1992 . [2]

Use in horticulture

This species requires a loose, friable peaty soil mixture and good drainage. Plants perform better when root-bound, with small applications of slow-release fertiliser at nine-monthly intervals. [6]

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References

  1. "Hoya macgillivrayi". Australian Plant Census. Retrieved 8 December 2024.
  2. 1 2 "Species profile—Hoya macgillivrayi (red hoya)". Queensland Government, Department of Education and Science. Retrieved 8 December 2024.
  3. Forster, Paul Irwin; Liddle, David J. "Hoya macgillivrayi". Flora of Australia. Australian Biological Resources Study, Department of Climate Change, Energy, the Environment and Water: Canberra. Retrieved 8 December 2024.
  4. 1 2 "Hoya macgillivrayi". Australian Tropical Rainforest Plants. Retrieved 8 December 2024.
  5. "Hoya macgillivrayii". Australian Native Plants Society (Australia). Retrieved 8 December 2024.
  6. 1 2 3 4 Mullins, Effie. "Hoya macgillivrayi". Australian National Botanic Gardens and Centre for Australian National Biodiversity Research, Canberra. Retrieved 8 December 2024.
  7. "Hoya macgillivrayi". APNI. Retrieved 8 December 2024.
  8. Bailey, Frederick M. (1914). "Botany. Contributions to the Flora of Queensland". Queensland Agricultural Journal Series 2. 1: 190. Retrieved 8 December 2024.