Flora of North America species comparison

erect, usually simple, 30–150 cm, with short, dense, eglandular pubescence, sparsely so toward base.

erect, simple to sparingly branched, leafy, 20–70 cm, glabrous to puberulent, especially distally.

sessile, 2 per node;

blade prominently 3–5-veined, ovate-acuminate, round at base, (4–)6–10(–13) cm × (20–)30–50(–90) mm, appressed-pubescent on both surfaces.

2 per node, sessile or short-petiolate, largest near mid-stem region, reduced and withering proximally, blade elliptic-lanceolate, base cuneate or rounded, apex gradually acuminate and acute, glabrous to puberulent.

paniculate, narrow, many-flowered, open, bracteate, pedunculate, 10–50 × 3–5 cm, densely puberulent;

bracts narrowly lanceolate, 3–15 mm, apex acuminate;

peduncle ascending.

cymose, (1–)3–5(–12)-flowered, open, leafy.

ascending, recurved near apex, ca. equaling calyx.

1/2–21/2 times calyx, apex often becoming deflexed, glabrous to hirsute.

nocturnal;

calyx prominently 10-veined, tubular to narrowly campanulate and 6–9 × 3–4 mm in flower, turbinate and 10–12 × 4–5 mm in fruit, narrowed proximally around carpophore, veins parallel, green, broad, with pale commissures, puberulent, sometimes with few glands, lobes triangular-acute, 2–3 mm;

corolla white, clawed, claw equaling calyx, broadened into limb, limb obtriangular, deeply lobed, 7–9 mm, lobes ca. 8, linear, appendages minute;

stamens slightly longer than corolla;

styles 3, ca. 2 times as long as corolla.

calyx green, obscurely 10-veined, broadly tubular to campanulate, ± constricted at base around carpophore with broad umbilicate base, becoming broadly clavate in fruit, 14–17 × 5–9 mm, herbaceous, glabrous or hirsute, veins green, without pale commissures, lobes triangular, 2–3 mm;

corolla white, clawed, claw equaling calyx, expanded distally into 2-lobed limb, limb oblong, 6–7 mm, appendages oblong, 1–1.6 mm, margins ± entire;

stamens short-exserted;

stigmas 3, short-exserted.

narrowly ovoid, slightly longer than calyx, opening by 3 (splitting into 6) ascending teeth;

carpophore 2–2.5 mm.

globose, equaling calyx, opening by 3 broad teeth that sometimes split to form 6;

carpophore 5–6 mm.

dark brown, reniform, 0.8–1.5 mm, shallowly tuberculate.

dark brown to black, with grayish bloom, broadly reniform, not winged, 0.7–1 mm, sides with concentric crescents of low tubercles, larger and deeper on outer margins.

= 48.

= 48.