Flora of North America species comparison

branched distally, (0.3–)0.5–3(–4.2) dm, pubescent proximally, often glabrous distally, trichomes simple, 0.1–1 mm, sometimes with fewer, stalked, 2-rayed ones.

unbranched, 0.05–0.3 dm, densely pubescent throughout, trichomes simple, 0.4–1.3 mm, and stalked, 2–5-rayed, stellate, 0.1–0.6 mm.

rosulate; shortly petiolate;

petiole (0–0.5 cm), ciliate throughout;

blade obovate to oblanceolate or linear-lanceolate, (0.3–)1–2.8(–3.5) cm × (1–)2–6(–9) mm, margins entire or denticulate, (ciliate, trichomes simple, 0.4–1 mm), surfaces usually pubescent, abaxially with stalked, 2–4-rayed trichomes, 0.05–0.4(–0.5) mm, (rarely with simple trichomes along midvein), adaxially with simple trichomes sometimes also with 2-rayed ones, 0.07–0.4 mm, rarely glabrous.

(imbricate); rosulate;

sessile;

blade linear to linear-oblanceolate, 0.4–1.2 cm × 0.8–1.5 mm, margins entire, (ciliate, trichomes simple and spurred, (0.4–)0.6–1.4 mm), surfaces pubescent, abaxially (dense) with stalked, 2–12-rayed trichomes, 0.1–0.8 mm, adaxially with simple and 2-rayed ones, 0.3–1 mm, (midvein prominent).

(0 or) 1–3(–5);

sessile;

blade lanceolate to elliptic or ovate, margins entire or denticulate, surfaces pubescent as basal.

0.

(2–)6–30(–50)-flowered, ebracteate, elongated in fruit;

rachis straight or, rarely, flexuous, glabrous.

2–7-flowered, ebracteate, slightly elongated in fruit;

rachis not flexuous, pubescent as stem.

(chasmogamous, petaliferous);

sepals ovate, 1.4–2.1 mm, glabrous or sparsely pubescent, (trichomes simple);

petals yellow, spatulate to oblanceolate, 2–3.2 × 0.7–1.2 mm;

anthers ovate, 0.15–0.25 mm.

sepals oblong, 2.8–3.5 mm, pubescent, (trichomes simple and short-stalked, 2–4-rayed);

petals pale yellow, oblanceolate to spatulate, (4–)5–6 × (1.5–)2–3 mm;

anthers oblong, 0.5–0.7 mm.

divaricate-ascending or horizontal, (not appressed to rachis), usually straight, rarely curved upward, (3–)5–14(–16) mm (subequaling or shorter than fruit), usually glabrous, rarely sparsely puberulent.

divaricate-ascending, straight, 3–9 mm, pubescent, trichomes simple (0.4–1.4 mm), and stalked, 2–5-rayed (0.1–0.6 mm).

lanceolate to narrowly elliptic or linear, plane, flattened, (4–)6–12(–15) × (1–)1.4–2.1 mm;

valves glabrous;

ovules (20–)24–38(–44) per ovary;

style 0.01–0.12 mm.

often broadly ovoid to lanceolate, plane, slightly inflated basally, (5–)6–9 × (3–)3.7–5 mm;

valves densely pubescent, trichomes simple and 2-rayed, (0.2–)0.4–1 mm, (occasionally with fewer, smaller, 4- or 5-rayed ones);

ovules 8–12 per ovary;

style (0.6–)0.8–1.2 mm.

oblong, 0.7–1 × 0.4–0.5 mm.

oblong, 1.7–2.2 × 1–1.4 mm.

= 24.