Flora of North America species comparison

usually 1 per caudex branch, arising from center of rosette near ground surface, 1.5–6 dm, densely pubescent proximally, trichomes sessile, 2–4-rayed, 0.15–0.4 mm, usually sparsely pubescent distally, rarely glabrous.

1–4 per caudex branch, arising from margin of rosette near ground surface, 1–3 dm, glabrous throughout.

blade oblanceolate, 1.5–6 mm wide, margins usually entire, rarely denticulate, ciliate proximally, trichomes (simple), to 0.5 mm, surfaces sparsely to moderately pubescent, trichomes sessile, 3–5 (or 6)-rayed, 0.15–0.35 mm.

blade linear-oblanceolate to oblanceolate, 1–3(–5) mm wide, margins entire or minutely toothed, rarely ciliate near petiole base, trichomes (simple), to 0.8 mm, surfaces pubescent or glabrous, trichomes short-stalked, 3–6-rayed, 0.07–0.2 mm.

2–20(–38), often concealing stem proximally;

blade auricles 0.3–2 mm, surfaces of distalmost leaves sparsely pubescent or glabrous.

4–15, not concealing stem;

blade auricles 0.5–2.5 mm, surfaces of distalmost leaves glabrous.

5–20(–36)-flowered, usually unbranched.

12–40-flowered, usually unbranched.

ascending at anthesis;

sepals pubescent;

petals white or lavender, 5–7 × 0.9–1.3 mm, glabrous;

pollen spheroid.

divaricate to pendent at anthesis;

sepals pubescent;

petals lavender, 5–6 × ca. 1 mm, glabrous;

pollen ellipsoid or spheroid.

erect to ascending, usually straight, 3–10 mm, pubescent or glabrous, trichomes appressed, branched.

reflexed, abruptly recurved near base, 4–8 mm, glabrous.

ascending, not appressed to rachis, not secund, straight, edges parallel, 2.5–7.5 cm × 1.2–1.8 mm;

valves glabrous;

ovules 46–100 per ovary;

style 0.3–1 mm.

reflexed to closely pendent, usually appressed to rachis, often secund, straight, edges parallel, 0.3–0.42 cm × 1–1.5 mm;

valves glabrous;

ovules 46–60 per ovary.

uniseriate, 1.8–2.2 × 1–1.4 mm;

wing continuous, 0.1–0.4 mm wide.

uniseriate, 1–1.3 × 0.8–1 mm;

wing continuous, 0.05–0.1 mm wide.