Flora of North America species comparison

single or with few weak lateral branches, 5–20 dm, viscid-pubescent or glabrate with few hairs with swollen bases.

single (slender and wiry), with long basal branches, 2–10 dm, tuberculate-hispid.

petiole length to 1/2 blade, distal leaves sessile;

blade lanceolate to linear, progressively narrower distally, 2–8(–10.5) cm, apex acute to acuminate, surfaces viscid-pubescent or glabrate.

sessile;

proximal blades rounded to ovate, distal blades lanceolate to linear-lanceolate, 1–5 cm, base clasping, apex acuminate and often twisted, surfaces hispid.

unbranched or with few short lateral branches, somewhat leafy; flowering crepuscular (early morning).

simple or few-forked to more rarely many times branched, few-flowered, not leafy; flowering crepuscular.

0.2–0.4 cm.

0.3–0.7 cm.

calyx uniformly green or with weakly developed veins, 0.6–1 cm, densely viscid-pubescent (hairs with swollen bases), lobes narrowly triangular, shorter than tube, unequal;

corolla straight, 2–3.5 cm (excluding limb), viscid-puberulent externally, tube creamy white or tinged with purple-green or gray-green, 0.5–0.7 cm × 1.5–2 mm, widening to throat 2–3 × 5 mm (asymmetrically dilated distally), glabrous or minutely puberulent within, limb spreading or slightly reflexed, white or cream, pentagonal to ± circular and often asymmetrically spreading, 0.4–0.8 cm diam., lobes shallow and rounded or obtuse, broadly triangular (proximal lobes reflexed);

stamens inserted near base of throat, included;

filaments unequal, 4 of 3 cm (2 of these slightly longer), 1 shorter, 1.5–2 cm, glabrous or minutely pubescent proximally;

style straight, just shorter than longest stamen pair.

calyx green or purplish green, elliptic to ovate, 10-ribbed, 0.8–1.3 cm, sinus membranes long, minutely hispid, lobes linear-subulate, equal, length ± equaling tube, tips somewhat spreading;

corolla straight, 2.5–3.5 cm (excluding limb), puberulent, tube and throat not clearly differentiated, white or greenish-gray tinged, 2.5–3.5 cm, gradually widening from 1 mm to 2 mm diam., abruptly swollen to 4 mm diam., just below contracted mouth, glabrous or minutely puberulent internally, limb spreading or slightly reflexed, cream or white, stellate, 1 cm diam., lobes white adaxially, ivory or greenish purple or with purplish veins abaxially, ovate-acute;

stamens inserted just below mouth (4 inserted 0.4 cm below mouth, one 0.4 cm lower), included;

filaments free for at least some of their length (anthers not sessile), 4 nearly shorter than 0.1 mm and sometimes unequal, one 1 mm, glabrous;

anthers to 0.1 mm;

style straight, equaling or just exceeding stamens.

not tearing at sinuses, covering to 1/2 of mature capsule.

not tearing at sinuses, just covering capsule.

ovoid, 0.8–1.2 cm.

narrowly ovoid, 0.8–1.1 cm.

0.8 mm.

0.5 mm.

leaves: petiole length shorter than or almost equaling blade (2–3 cm);

blade elliptic or oblong-elliptic, 5–10 cm, surfaces viscid-pubescent.

leaves: petiole short and broad-winged or leaves sessile;

blade spatulate, obovate, or oblanceolate, 5–30 cm, surfaces hispid.

= 24.

= 24.