:Dendrobium jonesii
{{Short description|Species of orchid}}
{{Use Australian English|date=August 2024}}
{{Speciesbox
| name = Oak orchid
| image = Dendrobium ruppianum1.jpg
| image_caption = Dendrobium jonesii in the Osaka Prefectural Flowers Garden
| display_parents = 3
| status_system =
| status =
| genus = Dendrobium
| species = jonesii
| authority = Rendle{{WCSP |58093 |Dendrobium jonesii}}
| synonyms =
}}
Dendrobium jonesii, commonly known as the oak orchid{{cite book|last1=Jones|first1=David L.|title=A complete guide to native orchids of Australia including the island territories|date=2006|publisher=New Holland|location=Frenchs Forest, N.S.W.|isbn=1877069124|pages =405–406}} 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.File:Dendrobium ruppianum2.jpg
Description
Dendrobium jonesii is an epiphytic or lithophytic herb with dark brownish green pseudobulbs that are {{convert|200-500|mm|in|sigfig=1|abbr=on}} long, {{convert|30-40|mm|in|sigfig=1|abbr=on}} wide and tapered at both ends. There are between two and seven thin, leathery, dark green leaves {{convert|60-150|mm|in|sigfig=1|abbr=on}} long and {{convert|40-60|mm|in|sigfig=2|abbr=on}} wide. Between ten and thirty five cream-coloured or white resupinate flowers {{convert|16-20|mm|in|sigfig=1|abbr=on}} long and {{convert|20-25|mm|in|sigfig=1|abbr=on}} wide are borne on a flowering stem {{convert|200-350|mm|in|sigfig=1|abbr=on}} long. The sepals and petals are pointed, the sepals {{convert|16-22|mm|in|sigfig=1|abbr=on}} long and {{convert|2.5-4.5|mm|in|sigfig=1|abbr=on}} wide and the petals a similar length but narrower. The labellum is white with purple markings, about {{convert|8|mm|in|sigfig=1|abbr=on}} long and {{convert|7|mm|in|sigfig=1|abbr=on}} 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.{{cite web |author1=D.L.Jones |author2=T.Hopley |author3=S.M.Duffy |author1-link=David L. Jones (botanist) |year=2010 |access-date=30 May 2021 |url=http://www.canbr.gov.au/cpbr/cd-keys/RFKOrchids/key/rfkorchids/Media/Html/Thelychiton_jonesii_ssp._jonesii.htm |title=Factsheet - Thelychiton jonesii ssp. jonesii |website=Australian Tropical Rainforest Orchids |publisher=Centre for Australian National Biodiversity Research (CANBR), Australian Government}}{{cite web |author1=D.L.Jones |author2=T.Hopley |author3=S.M.Duffy |author1-link=David L. Jones (botanist) |year=2010 |access-date=30 May 2021 |url=http://www.canbr.gov.au/cpbr/cd-keys/RFKOrchids/key/rfkorchids/Media/Html/Thelychiton_jonesii_ssp._bancroftianum.htm |title=Factsheet - Thelychiton jonesii ssp. bancroftianum |website=Australian Tropical Rainforest Orchids |publisher=Centre for Australian National Biodiversity Research (CANBR), Australian Government}}
Taxonomy and naming
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{{cite web|title=Dendrobium jonesii|url= https://id.biodiversity.org.au/instance/apni/504693|publisher=APNI|accessdate=26 November 2018}}{{cite journal |last1=Rendle |first1=Alfred Barton |title=Queensland orchids |journal=Journal of Botany, British and Foreign |date=1901 |volume=39 |pages=197–198 |url=https://www.biodiversitylibrary.org/page/8074776#page/215/mode/1up |accessdate=26 November 2018}} and the specific epithet (jonesii) honours the collector of the type specimen.
There are two varieties:
- Dendrobium jonesii var. jonesii;{{WCSP |58096 |Dendrobium jonesii var. jonesii}}
- Dendrobium jonesii var. magnificum (Dockrill) Dockrill{{WCSP |58098 |Dendrobium jonesii var. magnificum}} – the large oak orchid which has larger flowers and a later flowering period.
Distribution and habitat
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.
References
{{Commons}}
{{Reflist}}
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{{DEFAULTSORT:Dendrobium Jonesii}}
Category:Orchids of Queensland