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 to elliptic or narrowly obovate, 20–45 × 3–10 cm, apex rounded to acute;

cauline leaves whorled, blade oblong-lanceolate, 10–32 × 3–7 cm.

diffuse.

elongate, open proximally, ± dense distally.

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 6–16(–25) mm;

corolla pale yellowish green, purple-dotted and sometimes suffused with pale purple, 10–21 mm, lobes elliptic-oblong, apex short-acuminate;

androecial corona of trichomes and deeply fringed scales to 3 mm;

style slender, distinct;

nectaries and foveae 1 per lobe, foveae round, opening directly adaxial to nectary, without a differentiated area on the corolla surface, rim ± evenly fringed all around.

 = 78.