Stems erect, 30–100 cm, often branched above. Herbage glabrous except hirsute on leaf veins. Leaves sessile or subsessile, 2–7 cm long. Inflorescence terminal spikes 3–12 cm long, of verticillasters in axils of reduced bracts. Flowers: calyx 1–3 mm long, the lobes ciliate, the tube glabrous; corolla 2–4 mm long, pale lavender. Roadsides, fields, ditches; valleys (
Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).
POLLINATORS The following animal species have been reported as pollinators of this plant species or its genus where their geographic ranges overlap:
Bombus vagans,
Bombus appositus,
Bombus bifarius,
Bombus centralis,
Bombus flavifrons,
Bombus huntii,
Bombus mixtus,
Bombus nevadensis,
Bombus rufocinctus,
Bombus sylvicola,
Bombus ternarius,
Bombus occidentalis,
Bombus bimaculatus,
Bombus griseocollis,
Bombus impatiens, and
Bombus insularis (Thorp et al. 1983, Colla and Dumesh 2010, Williams et al. 2014).