Flora of North America species comparison

unbranched or branched distally, (0.8–)2–8(–10) dm.

unbranched or branched distally, 1.2–6 dm.

(soon withered); rosulate;

petiolate;

blade 1- or 2-pinnatifid (with broadly linear to filiform lobes), 2–20 cm, margins sinuate-dentate.

not rosulate; shortly petiolate;

blade lanceolate to oblanceolate, 2–8 cm, margins coarsely dentate to pinnatifid.

blade linear, 1–10 cm × 1–3 mm, (smaller distally), base auriculate, margins entire.

blade lanceolate, 1.3–9 cm × 2–20 mm, (smaller distally), base auriculate, margins dentate.

ebracteate, (lax).

ebracteate, (lax, with a terminal cluster of dark purple or greenish yellow sterile flowers).

(markedly zygomorphic);

calyx urceolate;

sepals greenish yellow or purplish, (abaxial broadly ovate, not keeled, 4–6 × 3–4 mm, lateral ovate-lanceolate, keeled, 4–6 × 1.5–2 mm, adaxial suborbicular to broadly ovate-cordate, forming a bannerlike hood, keeled, 4–6 × 6–8 mm);

petals white (with brownish veins), 5–8 mm, blade 1–3 × 0.7–1.2 mm, margins crisped (channeled), claw 4–5 mm, wider than blade;

stamens in 3 unequal pairs;

filaments: abaxial pair (distinct), 4–5 mm, lateral pair 3–4 mm, adaxial pair (connate), 5–6 mm;

anthers: abaxial and lateral pairs fertile, 1.5–2 mm, adaxial pairs sterile, 0.3–0.7 mm;

gynophore 0.1–0.4 mm.

calyx campanulate;

sepals (of fertile flowers) dark purple, purplish, or greenish yellow, (oblong to lanceolate), 4–6 mm, (8–14 mm in sterile flowers), not or slightly keeled, (hirsute-hispid in fertile flowers, glabrous in sterile flowers);

petals: (abaxial pair spreading and reflexed, adaxial pair parallel and erect), purplish white, lemon-yellow, or yellowish white (with darker midvein), 7–12 mm, blade 2–4 × 1–2 mm, margins crisped, claw 5–8 mm, about as wide as blade;

stamens in 3 unequal pairs;

filaments: abaxial pair (distinct), 4–6 mm, lateral pair 3–4 mm, adaxial pair (connate their entire length), 6–9 mm;

anthers: abaxial and lateral pairs fertile, 1.3–2 mm, adaxial pairs sterile, 0.2–0.7 mm;

gynophore 0.4–1 mm.

strongly recurved, 2–5 mm.

divaricate to ascending, (straight, curved upward, or recurved), 3–8 mm.

pendent, smooth, straight, flattened, 2.4–5.6 cm × 1.2–1.7 mm;

valves each with obscure or somewhat prominent midvein;

replum straight;

ovules (10–)18–50 per ovary;

style 0.8–2 mm;

stigma entire.

ascending or reflexed, smooth, straight or slightly curved, flattened, 3.5–11.4 cm × 1.5–2 mm;

valves each with prominent midvein, (glabrate or sparsely to densely hispid, trichomes to 1.7 mm);

replum straight;

ovules 32–94 per ovary;

style 1–2 mm;

stigma entire.

oblong, 1.7–2 × 0.9–1.1 mm;

wing 0.2–0.3 mm wide, distal.

broadly oblong, 1.4–2 × 1–1.3 mm;

wing 0.15–0.3 mm wide, continuous.

= 28.