Habenaria triplonema

Habenaria triplonema, commonly known as the twisted rein orchid,[2] is a species of orchid that is endemic to northern Australia. It two or three leaves at its base and up to twenty five yellowish, strongly scented flowers.

Twisted rein orchid
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Orchidaceae
Subfamily: Orchidoideae
Tribe: Orchideae
Genus: Habenaria
Species:
H. triplonema
Binomial name
Habenaria triplonema

Description

Habenaria triplonema is a tuberous, perennial herb with between two and three bright green leaves. The leaves are 50–90 mm (2–4 in) long and 15–20 mm (0.6–0.8 in) wide. Between eight and twenty five fragrant, greenish yellow and white flowers, 11–14 mm (0.4–0.6 in) long and 12–16 mm (0.5–0.6 in) wide are borne on a flowering stem 300–500 mm (10–20 in) tall. The dorsal sepal is about 5 mm (0.20 in) long and 3 mm (0.12 in) wide and the lateral sepals are slightly wider and spread apart from each other. The petals are a similar size to the lateral sepals. The labellum has three thread-like lobes, the side lobes 12–15 mm (0.5–0.6 in) long and often twisted, the middle lobe 6–8 mm (0.2–0.3 in) long. The nectary spur is 27–32 mm (1.1–1.3 in) long. Flowering occurs from February to March.[2][3]

Taxonomy and naming

Habenaria triplonema was first formally described in 1911 by Rudolf Schlechter from a specimen collected from Port Darwin and the description was published in Repertorium specierum novarum regni vegetabilis.[4][5]

Distribution and habitat

The twisted rein is found in northern parts of the Northern Territory, in the Kimberley region of Western Australia, between Ingham and Rockhampton in Queensland, on some Torres Strait Islands and in New Guinea. It grows in open forest and woodlan, sometimes near swamps and often with tall grasses.[2][3][6][7]

References
  1. "Habenaria triplonema". World Checklist of Selected Plant Families (WCSP). Royal Botanic Gardens, Kew.
  2. Jones, David L. (2006). A complete guide to native orchids of Australia including the island territories. Frenchs Forest, N.S.W.: New Holland. p. 344. ISBN 1877069124.
  3. "Species information - Habenaria triplonema". Orchids of New Guinea. Retrieved 29 August 2018.
  4. "Homoranthus triplonema". APNI. Retrieved 29 August 2018.
  5. Schlechter, Rudolf (1911). "Orchidaceae novae et criticae". Repertorium Specierum Novarum Regni Vegetabilis. 9: 435. Retrieved 29 August 2018.
  6. "Habenaria triplonema". Northern Territory Flora Online. Retrieved 29 August 2018.
  7. "Habenaria triplonema". FloraBase. Western Australian Government Department of Parks and Wildlife.
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