Flora of North America species comparison

usually not branching, straight or flexuous, often scapelike, 0.5–3 dm.

usually branching, straight.

basal 1–3 dm × 2–15 mm, usually equaling or exceeding stem length;

blade flat, adaxial surface glabrous.

basal withering;

blade linear-attenuate.

subumbellate, 1–5-flowered;

bracts 2–several, lanceolate to linear, unequal, 1–5 cm, apex acuminate;

peduncle slender, becoming stouter, deflexed in fruit.

subumbellate, 1–4-flowered.

erect or spreading;

perianth open, campanulate;

sepals typically with purple glandular blotch near base, oblong-lanceolate, shorter than petals, adaxial surface minutely hairy, apex acute to acuminate;

petals yellowish white, sometimes lavender-tinged, frequently with narrow purple crescent distal to gland, broadly obovate, cuneate, moderately bearded nearly to apex, adaxial surface densely hairy, margins fringed, apex obtuse or acute;

glands transversely oblong, arched upward, ± deeply depressed, bordered proximally by narrow, ascending, deeply fringed membrane, distally by narrow, crenate membranes, gland surface with rather long, slender hairs toward distal portion;

anthers lanceolate, apex long-apiculate.

erect;

perianth pinkish or bluish gray, infrequently with longitudinal gray stripe, open, campanulate;

sepals invested near gland, with yellowish, distally enlarged or branching, gland-tipped hairs, base sometimes marked with dull purple, apex acuminate;

petals with median blotch usually surrounded by yellow zone, ± equaling sepals, base sometimes marked with dull purple;

glands round to lunate, depressed, surrounded with narrow, deeply fringed membrane, densely covered with short, distally branching hairs;

filaments shorter than anthers;

anthers oblong-lanceolate, apex obtuse to acute.

nodding, 3-winged, ellipsoid, apex usually acute.

erect, linear-oblong, 3-angled, apex acute.

pale yellow.

flat.

= 20.

= 18.