Naked-stemmed Evening-primrose - Camissonia scapoidea
MNPS Threat Rank
Taprooted annual. Stems erect, branched at the base, 5–20 cm. Herbage glabrate. Leaves long-petiolate, mostly basal; the blade ovate, 1–5 cm long with sinuate margins, sometimes with a few small lobes isolated below. Inflorescence an elongating raceme. Flowers: hypanthium 2–4 mm long; sepals 2–4 mm long; petals 3–5 mm long, basally, minutely red-spotted; stigma discoid. Capsule pedicellate, spreading-erect, clavate, 1–2 cm long, straight to slightly curved, glabrous (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX)
Wagner et al. (2007, Syst. Bot. Monogr. Vol. 83) treat this as Cyclismia scapoidea
(Torr. & A. Gray) Small.