Flora of North America species comparison

erect, 5–40 cm, softly pubescent to scabrous, eglandular or viscid-glandular, especially distally, very rarely glabrous, with several pairs of leaves equaling or shorter than internodes.

several–many, erect, branched and decumbent at base, rarely simple, 20–80 cm.

sessile, or basal with short pseudopetiole;

blade linear to lanceolate or broadly ovate, base round to cuneate, apex acute to shortly acuminate, puberulent on both surfaces, sometimes glandular.

mainly cauline, 2 per node, sessile, almost clasping, reduced proximal to inflorescence, blade broadly oblong to oblanceolate or lanceolate, rarely ± linear, 2–8 cm × 5–30 mm, base round, apex acute to acuminate.

usually with single dichotomy, rarely double, open, bracteate, branches often elongate, flowers 1 per node;

bracts foliaceous.

open dichasial cyme, 5–40-flowered, bracteate;

bracts much-reduced, lanceolate.

sharply reflexed at base, especially after anthesis, equaling calyx.

0.5–3 cm.

nodding;

calyx obscurely 10-veined, broadly campanulate, lobed, 6–8 mm, enlarging to 13–16 mm in fruit, herbaceous, usually with short, dense pubescence throughout, often glandular-viscid, veins green, rarely purplish tinged, conspicuous pale commissures absent;

lobes ovate-triangular, 1/2 to equaling tube, herbaceous;

petals creamy white, often greenish abaxially, rarely pink tinged to dusky pink (subsp. campanulata), clawed, to 2 times calyx, claw villose, limb deeply divided and fan-shaped with many narrow, linear lobes, lobes rapidly curling, margins deeply divided or erose, appendages 2–4, to 2 mm;

stamens exserted;

filaments hairy at base;

styles 3, to 2 times calyx.

bisexual and unisexual, some plants having bisexual flowers, others having pistillate unisexual flowers, 15–20 mm diam.;

calyx pale green, rarely purplish, campanulate, not contracted at mouth or base, inflated, 9–12 mm in flower, 12–18 × 7–11 mm in fruit, herbaceous, papery, venation obscure, reticulate, without conspicuous pale commissures, margins dentate, lobes broadly triangular, 2–3 mm, glabrous;

petals white, ca. 2 times as long as calyx;

limb obovate, emarginate to 2-lobed;

stamens exserted by 2–4 mm;

styles 3, cream to greenish, at most slightly pink tinged, 2 times longer than calyx.

ovoid, ca. equaling calyx and often splitting it, opening by 6 broadly triangular teeth;

carpophore 1–2.5 mm.

ovoid to globose, equaling calyx, opening by 6 teeth;

carpophore 2–3 mm.

brown, reniform, 2–2.5 mm broad, coarsely and ± evenly papillate;

papillae ca. as long as broad.

black or nearly so, globose-reniform, 1–1.5 mm, finely tuberculate.

= 24.