State Rank Reason (see State Rank above)
Not conclusively documented from the state though likely to be found in extreme eastern Montana.
Stems 4-angled, 40–120 cm. Herbage glabrate. Leaves lanceolate to ovate, 15–60 mm long. Inflorescence of solitary, short-pedicellate flowers in axils of reduced upper leaves. Flowers: hypanthium puberulent, 5–7 mm long; petals 6, 3–6 mm long; stamens 6 (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX)
Our plants are variety alatum