Flora of North America species comparison

usually branched near base, occasionally with distinct trunk (branches drooping), 10–60(–100) dm, glabrous, somewhat glaucous.

single or with few lateral branches (several robust basal branches on older plants), 2–6 dm, villous and viscid-pubescent.

petiole length 1/2 blade (not winged);

blade ovate to lanceolate, 5–25 cm, base acute or cordate, apex rounded, (rubbery), surfaces glabrous, glaucous.

sessile to short-petiolate;

blade ovate, 1–6 cm, becoming smaller distally, (fleshy), apex acute, surfaces scabrous with persistent swollen bases of short, patent trichomes.

branched, not leafy; flowering diurnal.

unbranched, few-flowered, densely leafy; flowering crepuscular.

0.3–1 cm.

0.2–0.5 cm.

calyx green, (evenly cylindric), 1–1.5 cm, without membranous sinuses, glabrous or minutely pubescent, lobes sharply triangular, equal, much shorter than tube;

corolla straight, 2.5–4.5 cm (excluding limb), glabrous or finely pubescent externally, tube bright yellow to greenish yellow, (cylindric to clavate, slightly constricted apically), 0.5–0.8 cm × 3 mm, widening slightly to throat 1.5–4 cm × 6–8 mm, glabrous within, limb assurgent, greenish yellow or bright green (usually distinct color from tube in young flowers), turning yellow and same color as tube with age, circular or pentagonal, 0.6–0.8 cm diam., lobes rounded, broadly triangular, equal;

stamens inserted at base of throat, extending to corolla mouth;

filaments subequal 2.5–4.5 cm, (geniculate at base), glabrous;

style straight, exceeding stamens and exserted from corolla mouth.

calyx uniformly green with poorly developed membranous sinuses, 0.8–1 cm, viscid-pubescent, lobes subulate, unequal (4 as long as tube, 1 longer);

corolla straight, 1.4–2 cm (excluding limb), minutely viscid-pubescent externally, tube white or tinged with purple externally, 0.3–0.4 cm × 1 mm, widening to throat 10–17 × 2–4 mm (oblique, often bent at junction of tube and throat), glabrous or minutely puberulent within, limb spreading, white, pentagonal to stellate, 0.6–0.8(–1) cm diam., lobes broadly triangular, unequal, acute;

stamens inserted at base of throat, extending nearly to corolla mouth;

filaments 1–1.5 cm, unequal, 1 much shorter (curved), glabrous;

style straight, just exceeding 4 long stamens.

not tearing along sinuses, covering mature capsule.

not tearing at sinuses, covering capsule.

ovoid, 0.7–1.5 cm.

ovoid, 0.4–0.6 cm.

0.5 mm.

0.5 mm.

trees or shrubs.

leaves: petiole length 1/8–1/2 blade;

blade broadly elliptic to rhombic-ovate, 6–20 cm, surfaces softly viscid-pubescent.

= 24.

= 48.