Flora of North America species comparison

1 per caudex branch, arising from center of rosette near ground surface, ca. 1 dm, densely pubescent proximally, trichomes stalked, (2 or) 3–6-rayed, 0.2–0.5 mm, glabrate distally.

usually 1 per caudex branch, arising from center of rosette, often slightly elevated above ground surface on woody base, 2–5 dm, glabrous throughout.

blade oblanceolate, 4–6 mm wide, margins entire, not ciliate, surfaces moderately pubescent, trichomes long-stalked, 3–6 (or 7)-rayed, 0.2–0.5 mm.

blade oblanceolate, 5–12 mm wide, margins dentate, ciliate (at least proximally), trichomes (usually simple), 1–2 mm, surfaces moderately pubescent, trichomes short-stalked, 2–4-rayed, 0.4–0.6 mm.

2–5, concealing stem proximally;

blade auricles absent, surfaces of distalmost leaves pubescent.

5–12, often concealing stem proximally;

blade auricles 1–2 mm, surfaces distally glabrous.

3- or 4-flowered, unbranched.

10–35-flowered, usually unbranched.

not seen.

divaricate-ascending at anthesis;

sepals glabrous;

petals white to lavender, 5–8 × 1.5–2 mm, glabrous;

pollen ellipsoid.

erect-ascending, straight, 4–5 mm, glabrous or sparsely pubescent, trichomes appressed, branched.

horizontal to divaricate-ascending, curved or angled downward, 10–20 mm, glabrous.

erect-ascending, sometimes appressed to rachis, not secund, straight, edges parallel, 3–4 cm × ca. 5 mm;

valves glabrous;

ovules ca. 16 per ovary;

style 0.5–0.7 mm.

widely pendent, not appressed to rachis, not secund, curved to nearly straight, edges parallel, 3.5–5 cm × 2.5–3 mm;

valves glabrous;

ovules 80–130 per ovary;

style 0.2–0.7 mm.

uniseriate, 5.5–6.5 × 4–4.5 mm;

wing continuous, 1–2 mm wide.

biseriate, 1.1–1.3 × 0.9–1 mm;

wing distal or continuous, 0.1–0.15 mm wide.