E-Flora BC: Electronic Atlas of the Flora of British Columbia

Neottia convallarioides
broad-leaved twayblade
Orchidaceae (Orchid family)

Introduction to Vascular Plants

© Jim Riley  Email the photographer   (Photo ID #767)

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Distribution of Neottia convallarioides
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Species Information

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Perennial herb from slender rhizomes, with fibrous roots; stems 10-35 cm tall, with 2 leaves, glandular-hairy above.
Two, near middle of stem, roughly opposite, elliptic to broadly egg-shaped or nearly circular, 2-7 cm long, 1.5-6 cm wide, smooth, abruptly tapered to base.
Inflorescence a many-flowered, terminal raceme, the flowers yellowish-green; sepals 4.5-6 mm long, narrowly lanceolate, 1-veined, distinct; petals similar to sepals but narrower, 4-5 mm long; lip 8-13 mm long, 5-7 mm wide at tip, broadly wedge-shaped, with a shallow notch at tip, base with a short triangular tooth on each side, short-clawed; column 2.5-3.5 mm long.
Capsules, spreading, egg-shaped, to 4 mm long.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Moist forests, bogs and streambanks in the montane zone; infrequent in BC south of 54 degrees N, rare in NW BC; amphiberingian, N to AK, E to NF and S to ME, NH, MI, WI, MN, SD, CO, AZ and CA; E Asia.

Source: The Illustrated Flora of British Columbia

Synonyms and Alternate Names

Listera convallarioides (Sw.) Nutt. ex Elliott

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References