Field Mustard - Brassica rapa
Mostly glabrous and glaucous annual. Stems erect, branched above, 30–100 cm. Basal leaves lyrate-pinnate with 2–6 lateral lobes and sinuate margins, early deciduous. Stem leaves lanceolate with entire margins, 3–10 cm long, becoming sessile, auriculate clasping. Petals 7–13 mm long. Fruits: the body 3–6 cm long, strongly 2-nerved; the beak 10–15 mm long, conical (Lesica 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 rufocinctus
, Bombus sitkensis
, and Bombus occidentalis
(Thorp et al. 1983).