Common Crown-vetch - Coronilla varia
Purple Crown-vetch, Trailing Crown-vetch, Purple Crownvetch,
Glabrous, extensively branched perennial. Stems lax to ascending, often clambering, 15–80 cm. Leaves odd-pinnate with 15 to 23 narrowly oblong leaflets 1–2 cm long with rounded, mucronate tips; stipules linear to oblong, 1–5 mm long, distinct. Inflorescence a hemispheric, ebracteate umbel with 6 to 25 spreading flowers on an erect peduncle exceeding the leaves. Flowers white to light purple, papilionaceous; calyx tube ca. 2 mm long; sepals ca. 1 mm long; banner 9–13 mm long, moderately reflexed; keel as long; stamens 9 united, 1 separate. Fruit ascending to erect, 2–6 cm long, linear, constricted between the 3 to 10 seeds (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX
The following animal species have been reported as pollinators of this plant species or its genus where their geographic ranges overlap: Bombus fervidus
, Bombus rufocinctus
, Bombus ternarius
, and Bombus griseocollis
(Colla and Dumesh 2010, Williams et al. 2014).