Flora of North America species comparison

unbranched, 0.3–1.3(–1.7) dm, usually glabrous throughout or sparsely pubescent proximally, rarely sparsely pubescent distally, trichomes simple and 2-rayed, 0.1–0.7 mm.

(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.

(not imbricate); rosulate;

petiolate;

petiole ciliate, (trichomes usually simple, rarely 2-rayed, not setiform);

blade narrowly oblanceolate to linear-lanceolate, (strongly differentiated into blade and petiole), (1.2–)1.8–6(–8.5) cm × 1–5(–7) mm, margins entire or sparsely denticulate, (ciliate as petiole; midvein not prominent), surfaces glabrous or pubescent, usually with simple trichomes 0.1–0.8 mm, rarely 2-rayed.

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.

1–8;

sessile;

blade lanceolate to narrowly oblong, margins usually entire, surfaces pubescent as basal.

usually 0, rarely 1–3;

sessile;

blade similar to basal.

5–17(–23)-flowered, ebracteate, elongated in fruit;

rachis not flexuous, usually glabrous, rarely pubescent, trichomes simple and 2-rayed, (non-crisped).

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

rachis not flexuous, usually glabrous, rarely sparsely pubescent.

sepals ovate, 2–2.5 mm, pubescent, (trichomes simple);

petals yellow, oblanceolate, 4–6 × 1.5–2 mm;

anthers oblong, 0.6–0.8 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.

divaricate-ascending or ascending, straight, 3–9(–13) mm, usually glabrous, rarely sparsely pubescent, trichomes simple.

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

linear-elliptic to elliptic, twisted or plane, flattened, 5–10(–13) × 1.5–2.5 mm;

valves usually glabrous, rarely puberulent, trichomes simple, 0.05–0.1 mm;

ovules 12–24 per ovary;

style 0.7–1.4(–1.8) 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.

ovoid, 1–1.2 × 0.7–0.8 mm.

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

= 16, 30, 32.