Flora of North America species comparison

simple or few from base (caudex), erect, usually unbranched, rarely branched (few) distally, (0.7–)1–3.8(–4.5) dm, (glabrous throughout or sparsely pubescent basally to distally).

simple or several from base (rosette), erect, often branched distally, 2–7(–10) dm, (hirsute basally, trichomes simple and minutely stalked, forked, rarely almost exclusively glabrous).

petiole (0.4–)1–3(–4.5) cm, (glabrous or sparsely ciliate);

blades oblanceolate, spatulate, or obovate, (0.7–)1.2–3 cm × 5–17(–22) mm, margins entire or dentate, (often ciliate), apex obtuse, surfaces glabrous or sparsely pubescent, trichomes short-stalked, forked and simple.

petiole 0.7–3 cm, (ciliate or not);

blade broadly spatulate to narrowly oblanceolate, 1.2–10 cm × 7–30 mm, margins entire or dentate, apex obtuse or acute, surfaces usually pubescent, sometimes glabrous, trichomes simple, forked and stalked, stellate.

(2 or) 3–5 (or 6);

blade linear, oblong, obovate, or oblanceolate, 0.7–3(–4) cm × 3–8 mm, base cuneate, not auriculate, margins usually entire, rarely few-toothed, apex obtuse, surfaces usually glabrous, rarely margins ciliate.

(2–)4–12(–18), (well-spaced or, rarely, overlapping);

blade ovate to oblong or lanceolate, 1.5–6.5(–10) cm × 5–30 mm, base auriculate, margins dentate or entire, apex acute or obtuse, surfaces sparsely hirsute or glabrous.

simple, (dense or lax).

simple or branched.

sepals (greenish), oblong, 3–4 × 1.5–2 mm, (usually glabrous, rarely with few trichomes subapically), lateral pair saccate basally;

petals white, spatulate, 7–11 × 2.5–4 mm, apex rounded;

filaments 3.5–5 mm;

anthers oblong, 0.8–1 mm.

sepals oblong, 3.5–5 × 1.2–2 mm, lateral pair saccate basally;

petals white, rarely pink, linear-oblanceolate or narrowly spatulate, (5.5–) 6.5–9(–10) × 1.5–3 mm, apex obtuse;

filaments 3.5–6 mm;

anthers oblong, 0.7–1 mm.

suberect, ascending, or divaricate, (2–)4–17(–22) mm, (glabrous).

erect to erect-ascending, 3.5–10(–15) mm, (glabrous or sparsely pubescent).

ascending to suberect, (not appressed to rachis), slightly torulose, sometimes slightly curved, strongly flattened, (2–)2.5–4(–4.6) cm × 1.7–2.2 mm;

valves each with prominent midvein extending full length;

ovules 14–26 per ovary;

style 0.5–1.2(–1.6) mm, (slender).

erect to erect-ascending, (often appressed to rachis), torulose, 3.5–6.5 cm × 1.2–1.8(–2) mm;

valves each with prominent midvein extending full length or to middle;

ovules 54–80 per ovary;

style (0.1–)0.3–1 mm.

winged distally, oblong to broadly ovate, (1.5–)1.8–2.5(–3) × 1–1.3 mm;

wing (0.2–)0.4–0.8(–1) mm wide.

usually narrowly winged throughout or only distally, rarely not winged, oblong or suborbicular, 1–1.8 × 0.9–1.3 mm;

wing to 0.2 mm wide distally.

= 32, 64.