Flora of North America species comparison

1–3 per caudex branch, arising laterally proximal to sterile shoots near ground surface, ca. 2.5 dm, densely pubescent proximally, trichomes simple and 2-rayed, 0.25–0.7 mm, glabrescent distally.

usually 1 per caudex branch, arising from center of rosette near ground surface, 3–8 dm, densely pubescent proximally, trichomes simple mixed with fewer short-stalked, 2-rayed ones, 0.4–1.5 mm, glabrous or sparsely pubescent distally.

blade oblanceolate to obovate, 2.5–5 mm wide, margins entire, ciliate along petiole, trichomes (simple), to 1 mm, surfaces densely pubescent, trichomes simple and short-stalked, 2- or 3-rayed, 0.25–0.5 mm.

blade oblanceolate or linear-oblanceolate, 3–12 mm wide, margins usually entire, rarely dentate, ciliate proximally, trichomes (usually simple), to 1 mm, surfaces densely pubescent, trichomes short-stalked, 2–5-rayed, 0.3–0.8 mm.

4–6, not concealing stem;

blade auricles ca. 1 mm, surfaces of distalmost leaves sparsely pubescent.

(9–)15–35, often concealing stem proximally;

blade auricles 3–10 mm, surfaces of distalmost leaves glabrous, sometimes margins ciliate.

6–10-flowered, unbranched.

12–50-flowered, usually unbranched.

ascending at anthesis;

sepals pubescent;

petals lavender, 4–5 × 1–1.5 mm, glabrous;

pollen ellipsoid.

ascending at anthesis;

sepals sparsely pubescent;

petals usually lavender to purple, rarely white, 7–13 × 2–5 mm, glabrous;

pollen ellipsoid.

ascending, straight, 6–10 mm, glabrous or sparsely pubescent, trichomes subappressed, branched.

usually ascending, rarely almost horizontal, straight or slightly recurved, 3–10(–18) mm, usually pubescent, rarely glabrous, trichomes spreading, usually simple.

divaricate-ascending, not appressed to rachis, not secund, slightly curved, edges parallel, 4–5 cm × ca. 1 mm;

valves glabrous;

ovules ca. 64 per ovary;

style ca. 0.2 mm.

usually ascending, rarely almost horizontal, not appressed to rachis, not secund, usually curved, edges parallel, 5–13 cm × 1.7–2 mm;

valves glabrous;

ovules 90–170 per ovary;

style 0.05–0.3 mm.

uniseriate, (none mature).

uniseriate, 1.5–2 × 1–1.5 mm;

wing continuous, 0.1–0.2 mm wide.

= 14.