Annual. Stems erect, 8–20 cm, often branched above. Basal leaves petiolate, obovate, deeply dentate, early deciduous. Stem leaves narrowly oblanceolate, 1–3 cm long, dentate. Vestiture of short, simple hairs. Flowers white; petals ca. 1 mm long; stamens 2. Fruit broadly elliptic, glabrous or pubescent, 2.5–3.5 mm long, notched; style lacking; pedicels spreading, glabrous or pubescent, 3–5 mm long. (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX
In Montana we have varieties pubescens
(Greene) Thell. and medium
(Greene) C.L. Hitchc.
Disturbed soil of roadsides, fields, grasslands, wetlands; plains, valleys, montane (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX