Flora of North America species comparison

unbranched or branched (few), 2.5–8.6 dm.

(base woody), virgately branched distally, 5–10 dm.

not rosulate; petiolate (petioles ciliate);

blade oblanceolate to spatulate, 2–8 cm (7–-25 mm wide), margins remotely dentate apically.

rosulate; petiolate;

blade oblanceolate, 3.5–7 cm, margins coarsely dentate distally.

blade ovate to lanceolate, 2–10 cm × 5–28 mm (smaller distally), base amplexicaul, margins entire, (apex acute to acuminate).

blade linear-lanceolate, 2–10 cm, (much smaller distally), base auriculate, margins entire.

ebracteate, (lax in bud).

bracteate below or between proximalmost 1 or 2 flowers, (lax).

calyx campanulate;

sepals (ascending), pale yellow to white, (broadly oblong to ovate) 5–9 mm, not keeled;

petals white, 7–11 mm, blade 2–4 × 1–1.3 mm, margins not crisped, claw 6–9 mm, wider than blade;

stamens nearly tetradynamous;

filaments: median pairs (distinct), 6.5–8.5 mm, lateral pair 4.5–5.5 mm;

anthers (all) fertile, 3.5–4.5 mm;

gynophore 0.5–1.5 mm.

calyx shape unknown;

sepals yellow, 8–9 mm, slightly keeled, (apex acuminate, recurved);

petals yellowish, 12–16 mm, blade 4–5 × 0.5–1 mm, (adaxial pair slightly longer), margins not crisped, claw 7–9 mm, wider than blade, (apex recurved);

stamens in 3 unequal pairs;

filaments: abaxial pair (distinct), 9–11 mm, lateral pair 7–9 mm, adaxial pair (connate distal to middle of their length), 13–16 mm;

anthers: abaxial and lateral pairs fertile, 3–3.5 mm, adaxial pair sterile, ca. 1 mm.

divaricate-ascending, (straight), 4–7.5 mm.

ascending, 3–6 mm, (strongly expanded at receptacle).

ascending to spreading, smooth, straight or curved, flattened, 5–12.7 cm × 1.5–3 mm;

valves each with obscure midvein (at least distally);

replum straight;

ovules 36–56 per ovary;

style 0.8–2.5 mm;

stigma subentire.

divaricate ascending, torulose, flattened, 4–8 cm × 1.5–2 mm;

replum straight;

ovules per ovary unknown;

style to 1 mm;

stigma entire.

oblong, 2–3 × 1.4–2 mm;

wing 0.1–0.2 mm wide at apex.

oblong, ca. 2 × 1 mm;

wing distal.

= 28.