Neottia convallarioides

Neottia convallarioides is a species of orchid known by the common names broad-lipped twayblade and broad-leaved twayblade. It was formerly placed in the genus Listera, but molecular phylogenetic studies have shown that Neottia nidus-avis, the bird's-nest orchid, evolved within the same group,[2] and all species of Listera have been moved to Neottia.[3]

Neottia convallarioides

Secure  (NatureServe)
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Asparagales
Family: Orchidaceae
Subfamily: Epidendroideae
Genus: Neottia
Species:
N. convallarioides
Binomial name
Neottia convallarioides
(Sw.) Rich.[1]
Synonyms[1]
  • Epipactis convallarioides Sw.
  • Listera convallarioides (Sw.) Nutt.
  • Serapias convallarioides (Sw.) Steud.
  • Diphryllum convallarioides (Sw.) Kuntze
  • Ophrys convallarioides (Sw.) W.Wight ex House
  • Bifolium convallarioides (Sw.) Nieuwl.
  • Listera convallarioides subsp. euconvallarioides Beauverd

Description

It is a rhizomatous perennial herb growing 10 to 35 centimeters tall. It has one pair of green oval leaves 2 to 7 cm long near the base of the stem. The inflorescence is a small raceme of green or yellow-green flowers. Each has 3 reflexed lance-shaped sepals, 2 similar petals, and a lobed, wedge-shaped labellum that measures 9 to 13 mm long. The plant sometimes forms large colonies, creating a groundcover.[4] It is known to hybridize with Neottia auriculata.[4]

Distribution and habitat

Neottia convallarioides can be found in moist habitats such as woods, forests, swamps, and streambanks. It is native to much of Canada and in parts of the United States (Alaska, the Great Lakes Region, New England, and the mountains of the West: Rockies, Cascades, Sierra Nevada, etc.). It also reportedly occurs in St. Pierre & Miquelon and on the Komandor Islands in the Bering Sea, part of the Russian Far East.[1][5][6]

References
  1. "Neottia convallarioides", World Checklist of Selected Plant Families, Royal Botanic Gardens, Kew, retrieved 2012-04-04
  2. Stace, Clive (2010), New Flora of the British Isles (3rd ed.), Cambridge, UK: Cambridge University Press, ISBN 978-0-521-70772-5, p. 864
  3. "Listera", World Checklist of Selected Plant Families, Royal Botanic Gardens, Kew, retrieved 2012-04-04
  4. Hoy, J. (2002). Conservation Assessment for Broad-leaved Twayblade (Listera convallarioides). USDA. White Mountain National Forest.
  5. Flora of North America v 26 p 590, Broad-leaved twayblade, Listera convallarioides (Swartz) Nuttall ex Elliott, Sketch Bot. S. Carolina. 2: 494. 1823.
  6. Biota of North America Program, 2013 county distribution map, Neottia convallarioides
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