Flora of North America species comparison

not branching, straight, 1–5 dm.

usually branching, 1–3 dm.

basal persistent, subtended by inflorescence, 1–3 dm × 5–25 mm;

blade flat, tapering toward both ends, becoming involute.

basal persistent, ca. 2 dm;

blade glabrous adaxially.

subumbellate, 1–5-flowered;

bracts 2 or more, narrowly lanceolate to linear, long-attenuate, unequal, 1–5 cm.

1–5-flowered.

erect;

perianth open, campanulate;

sepals ovate to lanceolate, usually much shorter than petals, glabrous, apex acute to acuminate;

petals creamy white to lavender, with conspicuous median red-purple adaxial blotch, obovate, invested near gland with few long, flexuous hairs, base cuneate, apex rounded or acute;

glands triangular-lunate, slightly depressed, bordered proximally by comparatively narrow, deeply fringed membrane, distally often by narrower, crenate membranes, enclosed surface densely covered with long yellowish hairs, which, with membrane fringe, are often inconspicuously papillose;

filaments slightly longer than anthers;

anthers oblong, apex obtuse.

erect;

perianth open, campanulate;

sepals 25–30 mm;

petals purplish, with darker purple abaxial crescent distal to gland, 30–40 mm, not ciliate at base, ± hairy;

glands deeply depressed, bordered proximally by wide ciliate membrane, distally by short hairs.

erect, 3-winged, ellipsoid-oblong.

erect, 3-winged, ellipsoid, 20–25 mm.

light beige.

irregular.

= 20.