Flora of North America species comparison

single or with multiple robust branches, 3–20 dm, moist, patent, viscid-pubescent.

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

sessile or short-petiolate, congested toward inflorescence;

blade ovate to lanceolate, 1–4 cm, gradually decreasing in size and narrower distally, apex acute to acuminate, surfaces coarsely 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.

unbranched or few-branched, leafy to bracteate; flowering crepuscular.

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

0.4–1 cm (longer in fruit).

0.3–0.7 cm.

calyx green, elliptic, 10-ridged (or more in fasciated plants), 0.9–3.5 cm, densely viscid-pubescent, (trichomes occasionally with swollen bases), lobes linear, ± equal, length equaling or sometimes exceeding tube, sinus membranes long, transparent;

corolla straight, 2–5 cm (excluding limb), minutely viscid-pubescent externally, tube and throat not well differentiated, white or ivory, or tinged purple externally and oily-glossy, broadly trumpet-shaped, tubular portion from 2 mm diam. at base to 7 mm diam. at mouth (much wider in fasciated varieties), glabrous or minutely puberulent internally, limb spreading, cream to white flushed with grayish purple (externally), stellate to pentagonal, 2–5 cm diam., lobes broadly triangular, acute;

stamens unequal, 4 inserted just below mouth, exserted, 1 inserted ca. 1 cm deeper in throat, included;

filaments ± equal, 0.3–1 cm, glabrous;

style straight, just exceeding 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.

not tearing at sinuses, completely enclosing capsule.

not tearing at sinuses, just covering capsule.

narrowly ovoid, 1–2.5 cm.

narrowly ovoid, 0.8–1.1 cm.

0.9 mm.

0.5 mm.

leaves: petiole length to 1/2 blade;

blade elliptic to narrowly ovate, 1–1.5 cm, surfaces usually viscid-pubescent abaxially, glabrous adaxially.

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

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

= 48.

= 24.