Flora of North America species comparison

slender, not branching or rarely branching in axil of cauline leaf, straight, 2–4 dm.

not branching, straight, 1–5 dm.

basal persistent, 20–35 cm;

blade gradually tapering distally, adaxially pubescent.

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

blade flat, tapering toward both ends, becoming involute.

subumbellate, 1–3-flowered;

bracts 2, subopposite, linear to narrowly lanceolate, attenuate, 1–3 cm.

subumbellate, 1–5-flowered;

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

erect;

perianth open, campanulate;

sepals shorter than petals, ovate-acuminate, glabrous;

petals yellowish white, with purplish hairs toward base, broadly obovate, cuneate, inconspicuously fringed laterally, sparingly short-hairy adaxially, apex rounded;

glands transversely oblong, slightly depressed, densely covered with short, distally branching hairs, the bases of which unite at lower margin to form inconspicuous, discontinuous membranes;

filaments shorter than anthers;

anthers oblong-lanceolate, apex acute to short-apiculate.

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, 3-winged, ellipsoid, ca. 2 cm, base and apex acute.

erect, 3-winged, ellipsoid-oblong.

light-colored, irregular.

light beige.

= 20.

= 20.