Dendrobium jonesii
| Oak orchid | |
|---|---|
| |
| Dendrobium jonesii in the Osaka Prefectural Flowers Garden | |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Monocots |
| Order: | Asparagales |
| Family: | Orchidaceae |
| Subfamily: | Epidendroideae |
| Tribe: | Malaxideae |
| Subtribe: | Dendrobiinae |
| Genus: | Dendrobium |
| Species: | D. jonesii
|
| Binomial name | |
| Dendrobium jonesii | |
| Synonyms[1] | |
Dendrobium jonesii, commonly known as the oak orchid[2] is a species of epiphytic or lithophytic orchid endemic to far north Queensland. It has spindle-shaped pseudobulbs, up to seven thin, dark green leaves and up to thirty five crowded, star-like, fragrant cream-coloured or white flowers with purple markings on the labellum.
Description
[edit]Dendrobium jonesii is an epiphytic or lithophytic herb with dark brownish green pseudobulbs that are 200–500 mm (8–20 in) long, 30–40 mm (1–2 in) wide and tapered at both ends. There are between two and seven thin, leathery, dark green leaves 60–150 mm (2–6 in) long and 40–60 mm (1.6–2.4 in) wide. Between ten and thirty five cream-coloured or white resupinate flowers 16–20 mm (0.6–0.8 in) long and 20–25 mm (0.8–1 in) wide are borne on a flowering stem 200–350 mm (8–10 in) long. The sepals and petals are pointed, the sepals 16–22 mm (0.6–0.9 in) long and 2.5–4.5 mm (0.1–0.2 in) wide and the petals a similar length but narrower. The labellum is white with purple markings, about 8 mm (0.3 in) long and 7 mm (0.3 in) wide with three lobes. The side lobes are curved and the middle lobe is oblong with an orange ridge along its midline. Flowering occurs from July to November.[2][3][4]
Taxonomy and naming
[edit]Dendrobium jonesii was first formally described in 1901 by Alfred Barton Rendle from a specimen collected by "Mr. Arthur Owen Jones, J.P.". The description was published in the Journal of Botany, British and Foreign[5][6] and the specific epithet (jonesii) honours the collector of the type specimen.[6]
There are two varieties:
- Dendrobium jonesii var. jonesii;[7]
- Dendrobium jonesii var. magnificum (Dockrill) Dockrill[8] – the large oak orchid which has larger flowers and a later flowering period.[2]
Distribution and habitat
[edit]The oak orchid grows in rainforest and in open forest where it often grows on she-oaks (Casuarina species) between the Iron Range National Park and Paluma. The variety magnificum grow at higher altitudes in the southern part of the species' range.[2][3][4]
References
[edit]
- ^ a b "Dendrobium jonesii". World Checklist of Selected Plant Families (WCSP). Royal Botanic Gardens, Kew.
- ^ a b c d Jones, David L. (2006). A complete guide to native orchids of Australia including the island territories. Frenchs Forest, N.S.W.: New Holland. pp. 405–406. ISBN 1877069124.
- ^ a b D.L.Jones; T.Hopley; S.M.Duffy (2010). "Factsheet - Thelychiton jonesii ssp. jonesii". Australian Tropical Rainforest Orchids. Centre for Australian National Biodiversity Research (CANBR), Australian Government. Retrieved 30 May 2021.
- ^ a b D.L.Jones; T.Hopley; S.M.Duffy (2010). "Factsheet - Thelychiton jonesii ssp. bancroftianum". Australian Tropical Rainforest Orchids. Centre for Australian National Biodiversity Research (CANBR), Australian Government. Retrieved 30 May 2021.
- ^ "Dendrobium jonesii". APNI. Retrieved 26 November 2018.
- ^ a b Rendle, Alfred Barton (1901). "Queensland orchids". Journal of Botany, British and Foreign. 39: 197–198. Retrieved 26 November 2018.
- ^ "Dendrobium jonesii var. jonesii". World Checklist of Selected Plant Families (WCSP). Royal Botanic Gardens, Kew.
- ^ "Dendrobium jonesii var. magnificum". World Checklist of Selected Plant Families (WCSP). Royal Botanic Gardens, Kew.