Flora of North America species comparison

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

erect to ascending, branched at apex of taproot, 2.5–8 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, 4.5–10 × 3–9 cm, base truncate to cordate, margins sinuate-dentate, apex acute to acuminate, 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 spikes;

spikes 5–19 cm;

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

bracts leaflike, subtending lower glomerules, absent for over 1/2 inflorescence, triangular, broadly hastate, 1–3.5 × 0.8–4 cm, apex acuminate, base truncate to hastate, sparsely farinose.

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 0.5–0.9 mm tube, lobes oblong or elliptic, 0.6–0.9(–1.1) × 0.4–1.2 mm, apex obtuse, rounded or truncate, scarcely abaxially keeled throughout, glabrous, not covering fruit at maturity;

stamens (4–)5;

stigmas 2.

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 rounded;

seed coat black, rugose.

= 18.