Flora of North America species comparison

1 per caudex branch, arising from center of rosette near ground surface, 0.5–1 dm, puberulent proximally, trichomes (scattered), simple, 0.02–0.1 mm, similarly pubescent distally.

usually 2–6 per caudex branch, arising from margin of rosette near ground surface, 0.5–2 dm, glabrous or sparsely pubescent proximally, trichomes simple and short-stalked, 2-rayed, to 0.2 mm, glabrous distally.

blade oblong-oblanceolate, 1–2 mm wide, margins entire, ciliate distally, trichomes (simple), 0.02–0.1 mm, surfaces glabrous.

blade linear-oblanceolate, 1–2.5 mm wide, margins entire, ciliate along petiole, trichomes (simple), 0.4–0.7 mm, surfaces usually sparsely pubescent, rarely glabrous, trichomes short-stalked, 2- or 3-rayed, 0.1–0.4 mm.

3–7, not concealing stem;

blade auricles absent, surfaces of distalmost leaves glabrous.

3–5, not concealing stem;

blade auricles 0–0.2 mm, surfaces of distalmost leaves usually glabrous or, rarely, margins sparsely ciliate.

4–7-flowered, unbranched.

6–13-flowered, unbranched.

ascending at anthesis;

sepals glabrous;

petals lavender, 4–5 × 1–1.2 mm, glabrous;

pollen ellipsoid.

divaricate-ascending at anthesis;

sepals glabrous or sparsely pubescent, trichomes spreading, 2-rayed;

petals white to lavender, 4–5 × 1.5–1.8 mm, glabrous;

pollen spheroid.

ascending, straight, 5–9 mm, glabrous.

horizontal to divaricate-descending, straight or slightly curved downward, 2–5 mm, glabrous.

ascending, not appressed to rachis, not secund, straight, edges parallel, 2.5–3 cm × 1–1.5 mm;

valves glabrous;

ovules 30–34 per ovary;

style ca. 0.5 mm.

horizontal or divaricate-descending, not appressed to rachis, secund, straight, edges parallel, 1.6–3.2 cm × 1.5–2 mm;

valves glabrous;

ovules 20–32 per ovary;

style 0.1–0.4 mm.

uniseriate, ca. 1.2 × 0.8 mm;

wing distal or continuous, ca. 0.1 mm wide.

uniseriate, 1.2–1.5 × 0.8–0.9 mm;

not winged or with distal wing 0.05–0.1 mm wide.