Flora of North America species comparison

usually 1 per caudex branch, arising from center of rosette near ground surface, (0.8–)2–5 dm, densely pubescent proximally, trichomes short-stalked, 7–12-rayed, 0.1–0.2 mm, densely to sparsely pubescent distally.

usually 1 per caudex branch, arising from center of rosette, elevated above ground surface on woody base, 1–4(–5) dm, usually glabrous proximally, rarely pubescent, trichomes short-stalked, 2-rayed, 0.1–0.3 mm, glabrous distally.

blade oblanceolate, 3–10 mm wide, margins entire, not ciliate, surfaces densely pubescent, trichomes short-stalked, 7–12-rayed, 0.1–0.2 mm.

blade narrowly oblanceolate, 1.5–6 mm wide, margins entire, not ciliate or, rarely, with simple trichomes to 0.7 mm, surfaces glabrous or sparsely to densely pubescent, trichomes short-stalked, 2–6-rayed, 0.07–0.4 mm.

14–60, concealing stem for most of length;

blade auricles 0.5–4 mm, surfaces of distalmost leaves densely pubescent.

(4–)6–12, sometimes concealing stem proximally;

blade auricles 0.5–2 mm, surfaces of distalmost leaves glabrous.

20–70-flowered, usually unbranched.

6–12-flowered, usually unbranched.

ascending at anthesis;

sepals pubescent;

petals lavender, 6–9 × 0.8–1.2 mm, glabrous;

pollen ellipsoid.

pendent at anthesis;

sepals glabrous;

petals purple or whitish with rose tips, 4.5–6 × 2–2.5 mm, glabrous;

pollen ellipsoid or spheroid.

divaricate-ascending, straight, 7–28 mm, pubescent, trichomes appressed, branched.

reflexed, usually abruptly recurved at base, otherwise straight, 4–18 mm, glabrous.

divaricate-ascending, not appressed to rachis, not secund, usually curved, rarely straight, edges parallel, 4.5–11 cm × 1.5–2 mm;

valves glabrous or sparsely pubescent throughout;

ovules 140–190 per ovary;

style 0.05–0.6 mm.

reflexed to closely pendent, sometimes appressed to rachis, often secund, straight to somewhat curved, edges undulate (not parallel), 3–7(–8) cm × 3–5(–6) mm;

valves glabrous;

ovules 20–30 per ovary;

style 0.4–1.2 mm.

sub-biseriate, 1–1.3 × 0.7–0.8 mm;

wing distal or, rarely, absent, 0.05–0.1 mm wide.

uniseriate, 2.5–5.5 × 1.8–3.5 mm;

wing continuous, 0.8–1.5 mm wide.