Flora of North America species comparison

± slender, usually not branching, often scapelike, 0.5–2 dm.

twining or straggling over ground, branching, 1–2 dm, usually sinuous.

basal persistent, 1–2 dm;

blade linear, flat, glabrous adaxially.

basal, withering;

blade linear, attenuate.

1–7-flowered.

1–4-flowered;

bracts 1–3 cm.

erect to spreading;

perianth open, campanulate;

sepals oblong-lanceolate, 12–16 mm, usually glabrous, adaxial surface minutely papillose;

petals light green to white, usually with purple crescent distal to gland, ± oblanceolate or broader, 10–15 mm, adaxial surface hairy only distal to gland, margins conspicuously ciliate;

glands lunate, usually slightly depressed, bordered proximally by ± ciliate membrane, distally by short hairs;

anthers lanceolate, apex apiculate.

erect;

perianth open, campanulate, each member with transverse yellow band;

sepals lanceolate to lanceolate-ovate, 2–3 cm;

petals white with lilac tinge, darker veined, especially distally, sometimes with purple blotch distal to gland, obovate to cuneate, 3–4 cm, with sparse or dense, short or long hairs near gland, apex rounded;

glands transverse-lunate or wider, densely short-hairy;

filaments 6–10 mm;

anthers oblong, 5–7 mm, apex obtuse or acute.

nodding, winged, ellipsoid-globular, 1–2 cm, apex obtuse or acute.

erect, lanceoloid, angled, stout, 3–4 cm.

light brown, irregular.

light beige, flat.

= 20.

= 14.