Flora of North America species comparison

usually 1 per caudex branch, arising from center of rosette near ground surface, 0.7–2.2 dm, glabrous throughout.

usually 1 per caudex branch, arising from center of rosette near ground surface, 0.4–1.4 dm, densely pubescent proximally, trichomes short-stalked, 2- or 3-rayed, 0.2–0.3 mm, sparsely to moderately pubescent distally.

blade oblanceolate, 1–2 mm wide, margins entire, ciliate near petiole base, trichomes (simple), to 0.4 mm, surfaces sparsely to densely pubescent, trichomes short-stalked, 4–8-rayed, 0.03–0.1 mm.

blade narrowly oblanceolate to linear, 0.8–1.8 mm wide, margins entire, ciliate along petiole, trichomes (simple), to 0.8 mm, surfaces densely pubescent, trichomes short-stalked, 2- or 3-rayed, 0.2–0.3 mm.

6–11, sometimes concealing stem proximally;

blade auricles to 0.5 mm, surfaces of distalmost leaves glabrous.

6–10, somewhat concealing stem proximally;

blade auricles to 0.5 mm, surfaces of distalmost leaves pubescent.

5–17-flowered, unbranched.

6–15-flowered, usually unbranched.

erect at anthesis;

sepals glabrous;

petals white, 3–4 × 0.5–0.8 mm, glabrous;

pollen ellipsoid.

ascending at anthesis;

sepals pubescent;

petals purplish, 4–5 × 1–1.8 mm, glabrous;

pollen ellipsoid.

erect, straight, 2–4(–7) mm, glabrous.

ascending, straight, 3–8 mm, pubescent, trichomes appressed, branched.

erect, usually appressed to rachis, not secund, straight, edges parallel, 2–3.5 cm × 2.2–2.5 mm;

valves glabrous;

ovules 60–96 per ovary;

style 0.05–0.2 mm.

suberect or ascending, sometimes appressed to rachis, not secund, straight, edges parallel, 2.5–4 cm × 1.2–1.8 mm;

valves glabrous;

ovules 50–60 per ovary;

style 0.05–0.1 mm.

sub-biseriate, 0.7–0.9 × 0.5–0.6 mm, not winged or minutely winged distally.

uniseriate, 1.2–1.8 × 1–1.5 mm;

wing continuous, 0.1–0.2 mm wide.