Flora of North America species comparison

usually 1.

1.

blades white-margined;

basal linear-lanceolate to narrowly oblanceolate, 5–20 × 0.7–2(–3) cm;

cauline leaves opposite, distal blades lanceolate.

blades not white-margined;

basal spatulate-obovate, 15–60 (including proximal petiolar portions) × 3–17 cm;

cauline leaves generally whorled, blade widely elliptic to ovate, apex obtuse to acute (proximal) to acuminate (distal).

diffuse.

dense, sometimes interrupted proximally.

calyx 3–6 mm;

corolla greenish white to greenish yellow, dark green- or purple-dotted, 7–12 mm, lobes elliptic-ovate, apex abruptly acuminate;

androecial corona ± fringed;

style slender, distinct;

nectaries 2 per lobe, in closely paired, ± separate foveae, foveae opening distal to nectaries, into a single widely ovate-triangular differentiated area on the corolla surface shaped ± like the spade on playing cards, rim ± sparsely short- to long-fringed.

calyx 7–15 mm;

corolla white or pale greenish yellow, pale yellow near midvein, sometimes with violet-blue tinge, not spotted, 5.3–11 mm, lobes ovate-oblong, apex acuminate;

androecial corona a dense fringe to 5 mm;

style short, ± stout and indistinctly differentiated from summit of ovary;

nectaries and foveae 1 per corolla lobe, foveae round or nearly so, opening directly adaxial to nectary, without a differentiated area on the corolla surface, rim raised, with long, incurved fringes all around.

 = 78.