Flora of North America species comparison

single or with few spreading lateral branches, 5–8(–10) dm, sparsely pubescent, usually not viscid, tuberculate.

single or multiple, stout, branches erect, 4–30 dm, viscid-pubescent.

sessile;

blade ovate to lanceolate or linear, 1–5 cm, progressively smaller and more linear towards inflorescence, base auriculate, apex acute to attenuate, surfaces coarsely viscid-pubescent.

sessile;

proximal blades elliptic, distal elliptic to elliptic-ovate, decreasing in size distally, 20–50 cm, base auriculate, apex acute to acuminate, surfaces viscid-pubescent.

false racemes, occasionally with few weak branches, not leafy; flowering crepuscular.

branched panicles with congested branches, appearing moplike, leafy; flowering crepuscular.

0.5–1.3 cm.

0.5–1.5 cm (nodding, flowers pendent).

calyx green or occasionally somewhat purplish-tinged, 1.5–2.5 cm, tube elliptic, 10-ribbed, sinus membranes long and transparent, minutely pubescent, sometimes viscid, lobes usually spreading, subulate, ± equal, equaling tube;

corolla straight, 4–12 cm (excluding limb), puberulent externally, tube and throat not well differentiated, straight, white or often grayish white, 2 mm diam. at base, gradually widening and somewhat broader in distal 1/4, abruptly swollen to 6 mm diam. just below constricted mouth, glabrous or minutely puberulent internally, limb spreading, sometimes with purplish-gray veins abaxially, adaxially white or ivory, stellate, 2–5 cm diam., lobes triangular to deltate, acute;

stamens inserted in upper part of tube just below mouth, included;

filaments unequal, free for at least some of their length (anthers not sessile),four 0.1–0.8 cm (2 of these slightly longer), 1 shorter, ca. 0.1 cm, glabrous;

style straight, just exceeding stamens, exserted from corolla mouth.

calyx green, oblong or subglobose (somewhat twisted), 1–1.8 cm, viscid-pubescent, lobes erect, deltate to triangular, equal or nearly so, much shorter than tube;

corolla white, straight or very slightly curved, 6–9 cm (excluding limb), minutely viscid-pubescent without, tube white, cylindric, straight or slightly curved, 2 cm × 1–2 mm, throat 40–70 mm, glabrous or minutely puberulent internally, ventricose and inflated in middle to distal 1/3 (often somewhat asymmetrically), narrowing toward apex with constriction at mouth, 5 mm diam., limb spreading, tips somewhat reflexed, white, stellate, 1.5–2 cm diam., lobes white, broadly triangular, acute apically;

stamens inserted subequally at base of throat, included;

filaments unequal, 4 longer, 4–7 cm, just reaching corolla mouth, 1 slightly shorter, 4–6 cm, pubescent at insertion point;

style straight, just exceeding the 4 longer stamens, slightly exserted.

not tearing at scarious sinuses, nearly covering capsule, lobe tips spreading.

not tearing at sinuses, almost completely covering capsule.

ovoid, 1.1–1.6 cm.

ovoid, 1.5–1.8 cm.

0.5 mm.

0.5 mm.

leaves sessile;

blade elliptic to oblanceolate, 10–30(–50) cm, base narrowed and winged, surfaces coarsely viscid-pubescent.

leaves sessile;

blade elliptic, to 50 cm, base decurrent and often auriculate or clasping, surfaces viscid-pubescent.

= 20.

= 24.