Stems 5–20 cm, scapose with 2 sheathing bracts. Leaf basal, solitary, petiolate; blade glabrous, ovate, 3–6 cm long. Inflorescence a solitary flower subtended by a purplish, linear bract, 8–20 mm long. Flowers: sepals purple, lanceolate, 14–22 mm long, erect; upper 2 petals similar; lip petal forming a white- and purple-spotted pouch, ca. 2 cm long, open at the top, yellow within; margin of the orifice (lamina) bearded with paired horns near the front; column obovate, yellowish, hood-like over the lip. Capsule lanceoloid, 20–35 mm long (
Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).
We have varieties
occidentalis (Holz.) B. Boivin and
americana (R. Br). Luer.
POLLINATORS The following animal species have been reported as pollinators of this plant species or its genus where their geographic ranges overlap:
Bombus centralis,
Bombus fervidus,
Bombus flavifrons,
Bombus frigidus,
Bombus melanopygus,
Bombus mixtus,
Bombus rufocinctus, and
Bombus occidentalis (Ackerman 1981).