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Annual herb from a fibrous root; stems decumbent (taller plants) to erect (smaller plants), several to many, unbranched to few branched, glabrous, 2-5 (15) cm tall.
Basal leaves pinnate with 3-13 toothed or lobed segments, the segments oblanceolate, 4-10 mm long, sometimes again toothed, stalked, the stalks about as long as the leaves, glabrous, stem leaves similar, few.
Inflorescence of single, terminal flowers on stalks about as long as the leaves; petals usually 4, white to yellowish, egg-shaped, 4-5 mm long; sepals usually 4, egg-shaped, sharp-pointed, with 2 rows of hairs at the base, 3-4 mm long.
Nutlets, 3-4, rarely 1, somewhat cone-shaped, 2.8-3.2 mm long, greyish-green to brown, with small protrusions on the tops and sides. LINACEAE 1. Plants perennials; sepals rounded at the tips, not fringed; leaves linear, 3-veined only at the bases L. lewisii1. Plants annuals, biennials or perennials; sepals tapered to narrow points, inner ones usually fringed; leaves linear-lanceolate, 3-veined at least 1/2 their length. 2. Plants annuals; flower stalks 20-25 mm long; petals 10-14 mm long; capsules 10-14 mm long, or more; seeds with a short, blunt beak L. usitatissimum2. Plants biennials or perennials; flower stalks 5-18 mm long; petals 8-10 mm long; capsules 5-6 mm long; seeds beakless L. bienne
Source: The Illustrated Flora of British Columbia