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Montana Field Guide

Montana Field Guides

Western Twayblade - Listera caurina
Other Names:  Listera banksiana, Neottia banksiana

Native Species

Global Rank: G4
State Rank: S4
(see State Rank Reason below)

Agency Status
MNPS Threat Rank:
C-value: 7

External Links

State Rank Reason (see State Rank above)
Relatively common in moist forest habitats, predominantly west of the continental divide.
General Description
Stems 8–30 cm, glandular-pubescent above. Leaves broadly elliptic to ovate, 3–7 cm long. Inflorescence of 5 to 35 flowers; bracts 3–8 mm long. Flowers sepals 2–4 mm long, narrowly lanceolate; lip petal declined but not pendent, 4–7 mm long, pear-shaped, blunt-tipped, gradually tapered to the base. Capsule obovoid 4–7 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range

Range Comments
AK to CA, OR, ID and MT (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 173

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density



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


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Citation for data on this website:
Western Twayblade — Listera caurina.  Montana Field Guide.  .  Retrieved on , from