Curveseed Butterwort - Ranunculus testiculatus
Stems erect, 2–8 cm with villous, entirely basal leaves. Leaf blades 5–15 mm long, oblong to spatulate, divided into 3 to 7 linear lobes. Flowers solitary; petals quickly falling, 3–6 mm long, as long as the hairy sepals. Achenes 1–2 mm long, short-hairy with a blade-like beak ca. 3 mm long; heads cylindric, bristly, to 20 mm long. Disturbed soil of grasslands, along roads; plains, valleys (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 auricomus
, Bombus bifarius
, Bombus nevadensis
, and Bombus bimaculatus
(Macior 1968, Thorp et al. 1983).