Flora of North America species comparison

branched, (0.1–)1.5–4.3(–5.1) dm, hirsute throughout, trichomes simple, 0.4–1.3(–1.8) mm, with short-stalked to subsessile, 3–5-rayed ones, 0.2–0.4 mm, (some slightly coarser, 2-rayed).

(simple or few from, or distal to, base), unbranched, (0.1–)0.3–1.2(–1.6) dm, sparsely to densely pubescent proximally, trichomes 2 (or 3)-rayed, 0.1–0.6 mm, sometimes with simple or spurred ones, to 0.9 mm, distally usually glabrous, rarely with few trichomes.

rosulate;

petiolate;

petiole base ciliate or not;

blade oblanceolate to obovate, 0.9–4.1(–5.2) cm × 2–7(–10) mm, margins entire or dentate, surfaces pubescent, abaxially with stalked, cruciform, and fewer 3–5-rayed trichomes, 0.1–0.6 mm, adaxially with cruciform and simple trichomes, 0.4–1.3 mm, and smaller 2-rayed ones.

not rosulate;

petiole obscure;

blade elliptic or spatulate to obovate or suborbicular, 0.5–2.3(–3) cm × 1.5–8(–13) mm, margins entire, surfaces pubescent abaxially with stalked, 2–4-rayed trichomes, 0.1–0.5 mm, adaxially with simple trichomes, 0.6–1 mm, with stalked, 2-rayed ones, to 0.7 mm.

(8–)12–31(–43);

sessile;

blade ovate to lanceolate or oblong, margins usually dentate, rarely subentire, surfaces pubescent as basal.

usually 0, rarely 1–3;

sessile;

blade similar to basal.

10–52(–83)-flowered, usually ebracteate, rarely proximalmost 1 or 2 flowers bracteate, elongated in fruit;

rachis not flexuous, pubescent as stem.

(3–)5–12(–16)-flowered, ebracteate, (subumbellate), not elongated in fruit;

rachis not flexuous, usually glabrous, rarely sparsely pubescent.

sepals oblong, 2.5–4 mm, pubescent, (trichomes simple and stalked, 2-rayed);

petals yellow, oblanceolate, 5–7 × 1.5–2.2 mm;

anthers oblong, 0.5–0.8 mm.

(late-season ones cleistogamous, apetalous);

sepals oblong, 1.5–2.3 mm, pubescent, (trichomes simple);

petals (rarely absent), white, spatulate, 2–4.5 × 1–1.5 mm;

anthers ovate, 0.4–0.5 mm.

horizontal to divaricate-ascending, straight or slightly curved upward, 4–10(–13) mm, pubescent as rachis abaxially, glabrous adaxially.

horizontal to divaricate-ascending, straight, (1–)2–7(–9) mm, glabrous or glabrate.

(not appressed to rachis), lanceolate to ovate or oblong-lanceolate, slightly to strongly twisted or plane, flattened, 5–15 × 2–3.5 mm;

valves puberulent, trichomes simple and subsessile, 2(–4)-rayed, 0.03–0.25(–0.8) mm;

ovules 14–28 per ovary;

style (1–)1.5–3.5 mm.

linear to linear-oblong, plane, flattened, (5–)7–16(–20) × 1.2–2.3 mm;

valves glabrous or pubescent, trichomes usually simple and antrorse, 0.1–0.3 mm, rarely with fewer, spurred or 2-rayed ones;

ovules 32–88 per ovary;

style 0.02–0.1 mm.

oblong, 1–1.3 × 0.6–0.8 mm.

oblong to ovoid, 0.5–0.8 × 0.3–0.5 mm.

= 18.

= 16, 30, 32.