Flora of North America species comparison

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

erect or decumbent at base, branched, to 100 cm, finely hirsute, glandular-puberulent 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.

blade hirsute on both surfaces;

basal usually withering by flowering time, petiolate, blade oblong-lanceolate to elliptic;

cauline sessile, reduced into inflorescence, blade lanceolate to elliptic, 3–12 cm × 6–30 mm, apex acute.

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

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

peduncle ascending.

several–many-flowered (fewer in pistillate plants), open, dichasial cymes, bracteate;

bracts much reduced, lanceolate, herbaceous.

ascending, recurved near apex, ca. equaling calyx.

1–5 cm.

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.

unisexual, some plants having only staminate flowers, others having only pistillate flowers, fragrant, 25–35 mm diam.; in veined staminate plants subsessile to short-pedicellate, in pistillate plants pedicellate;

calyx prominently 10-veined in staminate flowers, 20-veined in pistillate, tubular, becoming ovate in pistillate flowers, 10–20(–24) × 8–15 mm in fruit, margins dentate, hirsute and shortly glandular-pubescent, lobes to 6 mm, broadly ovate with apex obtuse, to lanceolate with apex acuminate;

petals white, broadly obovate, ca. 2 times calyx, limb spreading, unlobed to 2-lobed;

stamens equaling to slightly longer than calyx;

stigmas (4–)5, slightly longer than calyx.

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

carpophore 2–2.5 mm.

ovate, ca. equaling calyx, opening by (4–)5, spreading to slightly reflexed, 2-fid teeth;

carpophore 1–2 mm.

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

dark gray-brown, reniform-rotund, plump, ca. 1.5 mm, coarsely tuberculate.

= 48.

= 24.