Flora of North America species comparison

usually 1 per caudex branch, arising from center of rosette near ground surface, 1.5–5 dm, densely pubescent proximally, trichomes short-stalked, 2–6-rayed, 0.2–0.5 mm, glabrous or sparsely pubescent distally.

usually 2–5 per caudex branch, arising from margin of rosette near ground surface, or arising laterally proximal to sterile shoots, 1–3 dm, pubescent proximally, trichomes simple, to 1 mm, mixed with short-stalked, 2-rayed ones, 0.15–0.5 mm, glabrous or sparsely pubescent distally.

blade oblanceolate, 2–10 mm wide, margins usually dentate, sometimes ciliate near petiole base, trichomes (usually spurred), to 0.7 mm, surfaces moderately to densely pubescent, trichomes short-stalked, 4–8-rayed, 0.1–0.4 mm.

blade linear-oblanceolate to oblanceolate, 1–5(–9) mm wide, margins entire, ciliate, trichomes (simple), to 1 mm, surfaces densely pubescent, trichomes simple and 2–4-rayed, 0.15–0.5 mm.

15–36, sometimes concealing stem proximally;

blade auricles 1–3 mm, surfaces of distalmost leaves sparsely pubescent.

3–7, not concealing stem;

blade auricles 0.5–1.5 mm, surfaces of distalmost leaves sparsely pubescent or glabrous.

20–55-flowered, usually unbranched.

10–20-flowered, usually unbranched.

divaricate-descending at anthesis;

sepals pubescent;

petals pale lavender, 5–8.5 × 1–2 mm, glabrous;

pollen spheroid.

divaricate-ascending at anthesis;

sepals pubescent;

petals white to pale lavender, 4–6 × 1.5–2 mm, glabrous;

pollen spheroid.

reflexed to divaricate-descending, usually curved downward, 8–14 mm, usually pubescent, rarely glabrous, trichomes subappressed, branched.

horizontal, slightly to strongly recurved near apex, 3–13 mm, glabrous or, rarely, with simple trichomes.

reflexed to pendent, rarely appressed to rachis, not secund, straight or slightly curved, edges parallel, 4–6 cm × 1–2 mm;

valves glabrous;

ovules 100–128 per ovary;

style 0.05–0.5 mm.

pendent, not appressed to rachis, not secund, straight to slightly curved, edges parallel, 3–4.5 cm × 1.8–2 mm;

valves glabrous;

ovules 42–70 per ovary;

style 0.1–0.3 mm.

biseriate to sub-biseriate, mature seeds not seen.

sub-biseriate, 1.2–1.5 × 0.8–1 mm;

wing absent or distal, 0.05–0.12 mm wide.