Flora of North America species comparison

usually 1 per caudex branch, arising from center of rosette near ground surface, or arising laterally proximal to sterile shoots, 0.5–2(–2.5) dm, glabrous or sparsely pubescent proximally, trichomes short-stalked, 2–6-rayed, 0.1–0.2 mm, glabrous distally.

1 or several per caudex branch, arising from center or margin of rosette near ground surface, 2–3.6 dm, densely pubescent proximally, trichomes simple and short-stalked, 2-rayed, 0.1–0.8 mm, glabrous distally.

blade oblanceolate to obovate, 1.5–5 mm wide, margins usually entire, rarely slightly dentate, ciliate along petiole, surfaces densely to sparsely pubescent, trichomes short-stalked, 3–9-rayed, 0.1–0.2 mm.

blade oblanceolate to linear-oblanceolate, 1–3(–5) mm wide, margins entire or minutely toothed, ciliate proximally, trichomes (simple), to 0.7 mm, surfaces densely pubescent, trichomes short-stalked, 3–6-rayed, 0.07–0.3 mm.

2–8(–12), not concealing stem;

blade auricles absent or 0.1–0.5 mm, surfaces of distalmost leaves glabrous or sparsely pubescent.

(5–)9–16, often concealing stem proximally;

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

3–12(–17)-flowered, usually unbranched.

10–33-flowered, usually unbranched.

divaricate-ascending at anthesis;

sepals glabrous or sparsely pubescent;

petals purple to lavender, 3.5–6 × 1–1.5 mm;

pollen ellipsoid or spheroid.

divaricate-ascending at anthesis;

sepals pubescent;

petals lavender to purple, 4–5 × 0.5–0.8 mm, glabrous;

pollen spheroid.

divaricate-ascending to slightly descending, usually slightly recurved, rarely straight, 2–6 mm, glabrous or sparsely pubescent, trichomes appressed, branched.

divaricate-ascending to horizontal, straight, 5–13(–17) mm, usually densely pubescent, rarely glabrous, trichomes appressed, 2- or 3-rayed.

divaricate-ascending to slightly descending, not appressed to rachis, secund, straight or curved, edges parallel, (1.6–) 2–4.4 cm × 1.6–2.3 mm;

valves glabrous;

ovules 28 40(–44) per ovary;

style 0.1–0.2 mm.

divaricate-ascending to descending, not appressed to rachis, not secund, usually curved, edges parallel, 3.5–6.5 cm × 0.8–1.2 mm;

valves glabrous;

ovules 56–78 per ovary;

style 0.1–0.4 mm.

uniseriate, 1.3–2 × 1–1.5 mm;

wing continuous, 0.1–0.5 mm wide.

uniseriate, 1–1.2 × 0.7–1 mm;

wing often continuous, 0.05–0.15 mm wide.

= 14.