Flora of North America species comparison

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

erect, branched, 1–6(–10) dm, glabrous (to sparsely farinose when young);

proximal branches decumbent.

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 1–2.5 cm;

blade triangular, ovate, or rhombic-ovate, 0.8–4(–8) × 0.4–3(–5) cm, base cuneate to rounded, margins irregularly dentate, apex acute to acuminate, glabrous (rarely indistinctly farinose when young).

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

bracts variable.

glomerules in terminal and lateral panicles, 6–7 × 4–5 cm;

glomerules subglobose, 2–4 mm diam., or some flowers not in glomerules;

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 5, distinct nearly to base;

lobes ovate, 0.5–0.8 × 0.6–0.7 mm, apex acute to obtuse, keeled abaxially, farinose, covering fruit at maturity;

stamens 5;

stigmas 2, 0.2 mm.

ovoid;

pericarp nonadherent, smooth.

depressed-ovoid;

pericarp adherent, pustulate, becoming smooth with maturity.

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

seed coat black, smooth, shiny.

lenticular, round, 1–1.5 mm diam.;

seed coat black, minutely rugose to ± smooth.

= 18.

= 18.