Flora of North America species comparison

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

decumbent to erect, simple or branched, leafy throughout, 5–30(–70) cm, usually glandular-puberulent distally, proximal pubescence varying from short and sparse to multicellular, crinkled and deflexed, glandular or not.

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;

blade usually oblanceolate to elliptic-lanceolate, rarely obovate or elliptic, 2–6(–10) cm × 3–20(–35) mm, broadest at or above middle, narrowed to base, margins ciliate with short, somewhat scabrid hairs, apex acute to acuminate, puberulent to pubescent.

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, or flowers axillary or solitary and terminal;

cyme loose, compound, leafy.

ascending, recurved near apex, ca. equaling calyx.

slender, 0.5–3 cm, glandular-puberulent.

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.

functionally unisexual, usually bisexual;

calyx obscurely 10-veined, campanulate, 5–8 mm, ca. 1/2 as wide, herbaceous, margins dentate, lobes lanceolate, 1.5–3 mm, apex recurved, subacute to acuminate, puberulent to pilose and glandular, veins without conspicuous, pale commissures;

corolla white, clawed, 1–11/2 times calyx, claw shorter than calyx, limb oblong, 2-lobed, 1.5–3 mm, lobes oblong, apex obtuse, appendages 2, small, 0.1–0.4 mm;

stamens in functionally staminate flowers equaling corolla, otherwise reduced and included in calyx;

stigmas 3(–4), equaling corolla in functionally pistillate flowers, otherwise included in calyx, papillate along whole length.

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

carpophore 2–2.5 mm.

green, becoming black, ovoid-ellipsoid, slightly longer than calyx, opening by 3 erect teeth which often split into 6;

carpophore ca. 1.5 mm.

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

black, not winged, broadly reniform, 0.5–1 mm, glossy, obscurely reticulate.

= 48.

= 24, 48.