Flora of North America species comparison

erect or semierect, branched, 1–5.5 dm, glabrous or sparsely farinose.

erect to ascending, unbranched, 2.5–7.5 dm, somewhat viscid and farinose.

nonaromatic;

petiole to 1 cm;

blade linear, 1-veined, 1–3(–5) × 0.1–0.2(–0.4) cm, somewhat fleshy, base cuneate, margins entire, apex acute to acuminate, glabrous.

nonaromatic;

petiole 1–12 cm;

blade triangular to broadly hastate, 4.5–10 × 3–9 cm, base truncate, cordate, or hastate, margins entire, apex acute (acuminate), adaxially sparsely farinose.

glomerules in terminal and axillary panicles, 6–25 × 5–20 cm, widely spaced, maturing at different times;

bracts variable.

dense glomerules sessile on terminal and axillary spikes, spikes 5–19 cm;

glomerules 3–5 mm diam., flowers developing at about same time;

bracts absent.

perianth segments 5, connate into 0.3–0.4 mm tube;

lobes ovate or orbicular-obovate, 1–1.4 mm, apex obtuse or rounded, cucullate, carinate, sparsely farinose, largely covering fruit at maturity;

stamens 5;

stigmas 2, 0.1 mm.

perianth segments connate into 0.4–0.6 mm tube, lobes oblong or elliptic, 0.8–1.5 × 0.5–1.1 mm, apex obtuse, rounded or truncate, scarcely abaxially keeled throughout, glabrous, not covering fruit at maturity;

stamens (4–)5;

stigmas 2–4.

ovoid;

pericarp nonadherent, smooth.

obovoid;

pericarp adherent, ± smooth.

ovoid, 1.2–1.6 mm diam., margins obtuse with narrow rim;

seed coat black, smooth, shiny.

obovoid or rotund, 1.5–2 mm in diam. margins not rounded;

seed coat black, rugose.

= 18.