Dendrobium discolor explained

Dendrobium discolor, commonly known as antler orchid^[1] or golden orchid,^[2] is a species of epiphytic or lithophytic orchid in the family Orchidaceae, and are native to northern Australia, New Guinea, and part of Indonesia. It has cylindrical pseudobulbs, each with between ten and thirty five leathery leaves, and flowering stems with up to forty mostly brownish or greenish flowers with wavy and twisted sepals and petals.

Description

Dendrobium discolor is an epiphytic or lithophytic herb with cylindrical green or yellowish pseudobulbs long, wide and occasionally over thick. There are between ten and thirty five leathery leaves long and wide. The flowering stem is long and bears between eight and forty light brown, reddish brown, dark brown or yellowish flowers. The flowers are long and wide with wavy and twisted sepals and petals. The sepals are long, and wide and the petals are long and wide. The labellum has mauve to purple markings and is long and wide with three main lobes. The side lobes are large and spread outwards or curve upwards and the middle lobe curves downwards and has at least three ridges and wavy edges. Flowering occurs from April to December.^{[3] [4] [5]}

Taxonomy and naming

Dendrobium discolor was first formally described in 1841 by John Lindley and the description was published in Edwards's Botanical Register.^{[6] [7]} The specific epithet (discolor) is a Latin word meaning "of different colours" or "variegated".^[8]

Infraspecifics

The following infraspecifics are accepted by Plants of the World Online as of March 2023:

• Dendrobium discolor var. broomfieldii (Fitzg.) A.D.Hawkes^[9] – or canary orchid has greenish yellow to bright golden yellow flowers from April to December, and occurs on the Whitsunday Islands.
• Dendrobium discolor Lindl. subsp. discolor^[10] – or golden antler orchid has light brown to dark brown, sometimes yellow to yellowish brown flowers with mauve to purple markings on the labellum, between August and November and occurs in Queensland, from the some Torres Strait Islands to Rockhampton.
• Dendrobium discolor var. fimbrilabium (Rchb.f.) Dockrill occurs in parts of Indonesia, New Guinea and Queensland.^{[11] [12]}
• Dendrobium discolor var. fuscum (Fitzg.) Dockrill^[13] – or brown antler orchid has relatively small, reddish brown to dark brown flowers with mauve to purple markings on the labellum from April to December and occurs in Queensland, from the some Torres Strait Islands to Mackay.
• Dendrobium discolor subsp. incurvata. Liddle & P.I.Forst. occurs in Papua New Guinea and Queensland.^{[14] [15]}

Distribution and habitat

Antler orchid grows in coastal scrub and on mangroves, in coastal rainforest, and woodland, sometimes on rocks. It occurs in Queensland, including on the islands of the Great Barrier Reef, New Guinea as well as in the Maluku Islands and Sulawesi in Indonesia.^{[16] [17]}

Notes and References

1. Book: Jones. David L.. A complete guide to native orchids of Australia including the island territories. 2006. New Holland. Frenchs Forest, N.S.W.. 394–396 . 978-1877069123.
2. Web site: Dendrobium discolor . Australian Museum - Lizard Island Research Station . 23 March 2023.
3. Web site: Dendrobium discolor . Orchids of New Guinea . 21 November 2018.
4. Web site: F.A.Zich . B.P.M.Hyland . T.Whiffen . R.A.Kerrigan . Bernard Hyland . 2020 . 28 May 2021 . Durabaculum undulatum var. broomfieldii . Australian Tropical Rainforest Plants (RFK8) . Centre for Australian National Biodiversity Research (CANBR), Australian Government.
5. Book: Lavarack . Peter S. ("Bill") . Harris . Wayne . Stocker . Geoff . Dendrobium and its relatives . 2000 . Timber Press . Portland, Oregon . 0881924903 . 256.
6. Web site: Dendrobium discolor. APNI. 21 November 2018.
7. Lindley . John . Miscellaneous notes . Edwards's Botanical Register . 1841 . 27 . 21 . 21 November 2018.
8. Book: Brown. Roland Wilbur. The Composition of Scientific Words. 1956. Smithsonian Institution Press. Washington, D.C.. 270.
9. Web site: Dendrobium discolor var. broomfieldii . Plants of the World Online . 23 March 2023.
10. Web site: Dendrobium discolor subsp. discolor . Plants of the World Online . 23 March 2023.
11. Web site: Dendrobium discolor var. fimbrilabium . Plants of the World Online . 23 March 2023.
12. Reichenbach . Heinrich Gustav . New garden plants . The Gardeners' Chronicle . 1878 . 9 . 40 . 21 November 2018.
13. Web site: Dendrobium discolor var. fuscum . Plants of the World Online . 23 March 2023.
14. Web site: Dendrobium discolor subsp. incurvata . Plants of the World Online . 23 March 2023.
15. Liddle . David J. . Forster . Paul I. . The recognition of subspecies in Dendrobium discolor Lindley (Orchidaceae) . Austrobaileya . 1990 . 3 . 2 . 320 . 41738767 .
16. Web site: Dendrobium discolor . Plants of the World Online . 9 November 2022.
17. Book: Cribb . Alan B. . Cribb . Joan W. . Plant life of the Great Barrier Reef and adjacent shores . 1985 . University of Queensland Press . St. Lucia . 0702219843. 172.