Annual. Stems ascending to erect, branched, 2–10 cm; outer branches often longer than the central axis. Herbage hirsute, glandular above. Leaves cauline; blades lanceolate to oblanceolate, 1–4 cm long, deeply pinnately divided into entire, lanceolate lobes. Inflorescence terminal cymes. Flowers: calyx hispid, 2–5 mm long, enlarged in fruit; corolla white, funnelform, 2–4 mm long, lobes <1 mm long; stamens and style included. Seeds several, cross-corrugated (
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 appositus,
Bombus bifarius,
Bombus centralis,
Bombus fervidus,
Bombus flavifrons,
Bombus frigidus,
Bombus huntii,
Bombus melanopygus,
Bombus mixtus,
Bombus nevadensis,
Bombus rufocinctus,
Bombus sylvicola,
Bombus sitkensis,
Bombus occidentalis,
Bombus griseocollis,
Bombus insularis, and
Bombus kirbiellus (Macior 1974, Thorp et al. 1983, Shaw and Taylor 1986, Mayer et al. 2000, Wilson et al. 2010, Pyke et al. 2012, Koch et al. 2012, Williams et al. 2014).