State Rank Reason (see State Rank above)
Widely, though sporadically distributed across Montana. Usually not abundant where found.
Usually biennial. Stems branched, 40–100 cm. Leaves lanceolate, sessile above, 4–15 cm long, deeply serrate. Flowers white with pectinate bracts adherent to the hypanthium, nocturnal; sepals 2–4 cm long; petals lanceolate, apparently 10 (5 are staminodes), 3–6 cm long. Capsule broadly cylindric, 2–4 cm long; seeds flattened, narrowly winged, horizontal in 3 to 5 columns (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX)
Sparsely vegetated, often gravelly soil of steep slopes, roadsides; plains, valleys (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX)