Flora of North America species comparison

single, usually unbranched, woody at base (hollow), 10–30 dm, viscid-pubescent.

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

sessile;

blade elliptic to lanceolate, 5–50 cm, becoming smaller distally, base tapering or decurrent, apex acute to acuminate, surfaces viscid-pubescent.

sessile;

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

branched with distinct central axis (branches themselves branched and shorter than central axis), usually somewhat leafy; flowering diurnal.

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

(spreading), 0.5–1.5 cm.

0.3–0.7 cm.

calyx uniformly green, 1.2–2.5 cm, viscid-pubescent, lobes long-triangular, equaling or shorter than tube, unequal;

corolla straight or strongly curved in distal 1/2, 3–5 cm (excluding limb), viscid-puberulent externally, tube pale greenish cream to pink or red, slightly curved or straight, 0.7–1.5 cm × 2–2.5 mm, widening to throat 25–40 × 5 mm, somewhat dilated distally, glabrous or minutely puberulent internally, limb spreading to somewhat reflexed, pale pink to reddish pink, occasionally white, pentagonal, 2–3 cm diam., lobes pale pink to reddish pink, occasionally white, acute;

stamens inserted near base of throat;

filaments unequal, 4 slightly exserted, 3–5 cm, 1 included, 3 cm (shorter than the other 4), pubescent on proximal 1/2;

style straight or slightly curved, ± equaling longer stamens.

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.

often tearing at sinuses (especially in cultivars), covering 1/2 mature capsule.

not tearing at sinuses, just covering capsule.

narrowly ellipsoid, ovoid, or globose, 1.2–2 cm.

narrowly ovoid, 0.8–1.1 cm.

0.5 mm.

0.5 mm.

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

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

= 48.

= 24.