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Montana Field Guide

Montana Field Guides

Broad-leaved Twayblade - Listera convallarioides
Other Names:  Neottia convallarioides

Native Species

Global Rank: G5
State Rank: S4
C-value: 8

Agency Status


External Links

General Description
Broad-lipped twayblade is only 5-10 inches tall with two, opposite, elliptic to nearly round, green leaves that are perpendicular to the stem. The stem above the leaves is whitish glandular hairy with up to 20 flowers that have a small lance-shaped leaf at the base of each flower stalk. This small green sepals and petals bend back from the dominant lip that is about 3/4" long, light green with a darker green center, narrow at the base and wide at the tip. Two shallow lobes at the tip make the lip resemble the folded wings of an insect. Sometimes there is a small tooth between the lobes. Reproduction by runners sometimes produces large colonies of plants.

Species Range
Montana Range Range Descriptions


Range Comments
AK to NL south to CA, UT, CO, MI, NY; Asia (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 26

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Relative Density



(Observations spanning multiple months or years are excluded from time charts)


  • Literature Cited AboveLegend:   View Online Publication
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • Hawkins, P.H. 1903. The alpine flora of Montana. M.Sc. Thesis, Bozeman, MT: Montana State University. 24 pp.
  • Web Search Engines for Articles on "Broad-leaved Twayblade"
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Citation for data on this website:
Broad-leaved Twayblade — Listera convallarioides.  Montana Field Guide.  .  Retrieved on , from