3. Corispermum villosum Rydb. (hairy bugseed)

C. orientale Lam. var. emarginatum (Rydb.) J.F. Macbr.

Pl. 357 d; Map 1545

Plants often moderately to densely stellate-hairy. Stems 5–50 cm long. Leaves 1.0–3.5 cm long, linear. Inflorescences mostly stout, narrowly club-shaped, conspicuously denser toward the tip, the flowers densely overlapping but becoming more widely spaced below the midpoint. Bracts 5–15 mm long, ovate to narrowly ovate, as wide as or wider than the fruits. Fruits 1.8–3.0 mm long, elliptic to ovate-elliptic or obovate-elliptic in outline, broadly angled at the tip, the wing absent or very narrow (to 0.15 mm wide), the body yellowish brown, light brown, or dark brown, usually with reddish brown spots and occasionally a few whitish, low, warty outgrowths. August–October.

Uncommon in the Missouri River floodplain (Idaho, Oregon, and Nevada east sporadically to Illinois and Missouri; Canada). Banks of rivers; also open, disturbed, sandy areas.