Flora of North America species comparison

erect to prostrate, branched from base, 0.5–2.5(–4) dm, farinose.

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

proximal branches decumbent.

nonaromatic;

petiole to 1 cm;

blade lanceolate to oblong or ovate, 0.5–4 × 0.3–1.5 cm, base cuneate, margins undulate-dentate, teeth obtuse or acute, apex obtuse or acute, densely farinose, glaucous abaxially.

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 or lateral spikes, 5–10 cm;

glomerules subglobose, 1.8–2.5 mm diam.;

bracts leaflike in inflorescence, elliptic, 0.2–1 × 0.1–0.5 cm, or absent at least in terminal 1/2 of inflorescence.

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 3–4;

lobes obovate to oblong, 0.5–0.7 × 0.4–0.5 mm, apex obtuse, rounded, not keeled, covering fruit at maturity;

stamen 1;

stigmas 2.

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.

depressed-ovoid;

pericarp adherent, pustulate, becoming smooth with maturity.

mostly horizontal, some vertical, margins rounded; vertical seeds ovoid to round, 0.6–1.1 mm diam.; horizontal seeds round, 0.6–1.1 mm diam.;

seed coat reddish brown, rugose-punctate.

lenticular, round, 1–1.5 mm diam.;

seed coat black, minutely rugose to ± smooth.

ovoid;

pericarp nonadherent, smooth.

= 18.

= 18.