Phaius amboinensis

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Arnhem Land swamp orchid
Phaius amboinensis.jpg
Pachystoma amboinensis on Rarotonga
Scientific classification Red Pencil Icon.png
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Orchidaceae
Subfamily: Epidendroideae
Genus: Phaius
Species:
P. amboinensis
Binomial name
Phaius amboinensis
Synonyms [1]
  • Bletia amboinensis Zipp. ex Blume
  • Phaius zollingeri Rchb.f.
  • Phaius graeffeiRchb.f.
  • Phaius papuanus Schltr.
  • Phaius amboinensis var. papuanus(Schltr.) Schltr.
  • Phaius neocaledonicusRendle

Phaius amboinensis, commonly known as Arnhem Land swamp orchid, [2] is a plant in the orchid family and is native to areas from Malesia through to New Guinea, Australia and islands in the Pacific Ocean. It is an evergreen, terrestrial herb with up to eight pleated leaves and up to twenty, relatively large white flowers with a yellow labellum. It grows in wet, shady forests.

Contents

Description

Phaius amboinensis is an evergreen, terrestrial herb which forms large clumps. It has three or four fleshy stems, 400–800 mm (20–30 in) long and 15–20 mm (0.6–0.8 in) wide. Each stem has between three and eight dark green, pleated leaves 300–400 mm (10–20 in) long and 7–14 mm (0.3–0.6 in) wide. Between five and twenty resupinate white flowers 40–70 mm (2–3 in) long and 42–75 mm (1.7–3.0 in) wide are borne on a flowering stem 300–900 mm (10–40 in) tall. The dorsal sepal is 30–35 mm (1.2–1.4 in) long, 7–8 mm (0.28–0.31 in) wide and more or less upright. The lateral sepals are a similar length but 8–10 mm (0.3–0.4 in) wide and spread apart from each other. The petals are a similar length to the sepals but narrower. The labellum is yellow, 25–30 mm (0.98–1.2 in) long and 20–25 mm (0.8–1 in) wide with three lobes and wavy edges. There is a complex callus in the centre of the labellum. Flowering occurs from August to November in Australia and over a longer period in Asia. [2] [3] [4]

Taxonomy and naming

Phaius amboinensis was first formally described in 1856 by Carl Ludwig Blume in his book Museum Botanicum Lugduno-Batavum sive stirpium Exoticarum, Novarum vel Minus Cognitarum ex Vivis aut Siccis Brevis Expositio et Descriptio. [5] [6] The specific epithet (amboinensis) is a reference to Ambon Island where the type specimen was collected. [6]

Distribution and habitat

The Arnhem Land swamp orchid in deep shade in wet forests. It occurs in Indonesia, the Philippines, New Guinea, the Northern Territory, New Caledonia, the Solomon Islands, Vanuatu and Samoa. [2] [4]

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References

  1. 1 2 "Phaius amboinensis". World Checklist of Selected Plant Families (WCSP). Royal Botanic Gardens, Kew.
  2. 1 2 3 Jones, David L. (2006). A complete guide to native orchids of Australia including the island territories. Frenchs Forest, N.S.W.: New Holland. p. 361. ISBN   1877069124.
  3. "Phaius amboinensis". Trin keys. Retrieved 29 October 2018.
  4. 1 2 "Phaius amboinensis". Orchids of New Guinea. Retrieved 29 October 2018.
  5. "Phaius amboinensis". APNI. Retrieved 28 October 2018.
  6. 1 2 Blume, Carl Ludwig (1856). Museum Botanicum Lugduno-Batavum sive stirpium Exoticarum, Novarum vel Minus Cognitarum ex Vivis aut Siccis Brevis Expositio et Descriptio. Batavia. p. 180. Retrieved 29 October 2018.