Sisyrinchium douglasii A. Dietrich, Sp. Pl. 2: 504. 1833, based on S. grandiflorum Douglas ex Lindley, Edwards’s Bot. Reg. 16: plate 1364. 1830, not Cavanilles 1790

Stems to 4.1 dm × 1–4.6 mm. Leaf blades 1.5–4.5 mm wide distal to midlength. Spathes 4.3–7 mm wide, outer 2–6.2 cm; hyaline margins 0.2–0.5(–1.6) mm wide, extending to just proximal to, or occasionally exceeding, green apex. Tepals 12.5–33 mm; filaments 6–12.2 mm; anthers 3–10.2 mm; ovary 2–5.6 mm; pedicel 2–3.8 cm. Capsules 4.5–11.3 mm. 2n = 64.

Varieties 2 (2 in the flora): w North America.