Flora of North America species comparison

usually 3–7 per caudex branch, arising from margin of rosette near ground surface, or arising laterally proximal to sterile shoots, 0.4–2.5 dm, glabrous or pubescent proximally, trichomes simple and short-stalked, 2-rayed, 0.1–0.4 mm, glabrous distally.

1 per plant, arising from center of rosette near ground surface, (1.5–)3–11 dm, glabrous throughout.

blade linear to linear-oblanceolate, 1–2.5 mm wide, margins usually entire, rarely denticulate, often ciliate, trichomes (simple), 0.3–0.7 mm, surfaces glabrous or sparsely pubescent, trichomes short-stalked, 2- or 3-rayed, 0.1–0.4 mm.

blade obovate to oblanceolate, (4–)10–40 mm wide, margins serrate or dentate, ciliate-mucronate on teeth, trichomes often minute, surfaces glabrous or sparsely pubescent, trichomes simple, 0.1–0.6 mm.

3–12, not concealing stem;

blade auricles absent, surfaces of distalmost leaves usually glabrous, rarely sparsely pubescent.

7–15, often concealing stem proximally;

blade auricles 3–12(–17) mm, surfaces of distalmost leaves glabrous.

2–12-flowered, unbranched.

16–45-flowered, sometimes branched.

ascending-divaricate at anthesis;

sepals glabrous or pubescent;

petals white to pale lavender, 4–5 × 1.5–2 mm, glabrous;

pollen ellipsoid.

ascending at anthesis;

sepals glabrous;

petals white, 3–5 × 1–1.5 mm, glabrous;

pollen ellipsoid.

divaricate-ascending to horizontal, slightly to strongly recurved, 3–8 mm, glabrous or sparsely pubescent, trichomes (isolated), simple.

suberect to divaricate-ascending, straight to slightly curved, 5–23 mm, glabrous.

pendent, not appressed to rachis, not or, rarely, weakly secund, straight, edges parallel, 1.5–3.5 cm × 1.2–2 mm;

valves glabrous;

ovules 28–44 per ovary;

style 0.1–0.4 mm.

divaricate-ascending, not appressed to rachis, rarely somewhat secund, curved, edges parallel, (4–)6–11.7 cm × 1–2 mm;

valves glabrous;

ovules 50–80 per ovary;

style 0.1–0.7(–1) mm.

uniseriate, 0.9–1.2 × 0.6–1 mm;

wing often continuous, 0.07–0.1 mm wide.

uniseriate, 1.2–2.2 × 0.8–1.4 mm;

wing continuous, 0.1–0.3 mm wide distally.

= 14.