Flora of North America species comparison

single, erect, unbranched or distally branched, often zigzag, solid, proximally usually glabrous or sparsely stellate-puberulent.

single or in dense patches, erect, solid, hairy, hairs simple, spreading, bristly.

cauline;

stipules deciduous or inconspicuous, sometimes purplish, subulate, 1–1.5(–3) × 0.5–1 mm;

petiole 0.5–1.5(–3) cm, usually 1/2 times involucellar bractlets absent.

cauline, evenly arrayed on stem;

stipules asymmetric-ovate and auriculate, 10–20 × 10–20 mm, width exceeding stem diam.;

petioles of proximal leaves 7–10 cm, gradually reduced distally to 2 cm, 1–1 1/2 times blade length proximally to 1/2 blade length distally;

blade ovate to elliptic, unlobed, usually (4–)7–8 × (2.5–)4–5 cm, reduced distally, base cordate, margins crenate-serrate, apex acute to rounded, surfaces glabrous abaxially, sparsely hirsute adaxially.

erect, capitate, ± dense, calyces overlapping, unbranched, 2–10-flowered, not elongate, not 1-sided, 3–5 cm;

proximalmost bracts involucrelike, similar to stipules in size and shape, narrowed to linear distally, usually divided to base, 10–20 mm, longer than pedicels, equaling or slightly shorter than calyx.

1–2 mm;

involucellar bractlets 3, 8–12 mm, equaling or longer than calyx.

bisexual or unisexual and pistillate, plants gynodioecious;

calyx 8–10(–12) mm, not much enlarging in fruit, stellate-canescent, sparsely ciliate;

petals pink to rose-purple or white, pale-veined, often whitened at base, 18–20(–25) mm;

stamens: outer filaments incompletely connate, distally distinct, anthers not attached to connate portion of filaments;

staminal column 6–7 mm, hairy;

anthers white, stalked, aborted in pistillate flowers;

stigmas 6 or 7.

bisexual;

calyx 8 mm, sparsely to densely bristly, sometimes also stellate-hairy;

petals pink, usually pale-veined, 15 mm;

staminal column 4–6 mm, hairy;

anthers white;

stigmas 7 or 8.

1.5–2 mm.

1.9 mm.

5–7 mm diam.;

mericarps 6 or 7, 2.5–4 mm, sides smooth, margins rugose, back reticulate-veined, deeply pitted especially on top, glabrous or glandular-puberulent, mucro 0.5–0.8(–1) mm.

4–5 mm diam.;

mericarps 7 or 8, 2 mm, glabrous, smooth, back with medial line, mucro absent.