Flora of North America species comparison

erect to prostrate, much-branched, 0.1–3.5 dm, glabrous.

erect, branched, 2–6 dm, glabrous.

nonaromatic;

petiole to 0.28 cm;

blade deltate or narrowly deltate, 0.8–6 × 0.2–3.5 cm, base cuneate, margins entire or broadly dentate, apex acute to obtuse.

nonaromatic;

petiole 0.5–2.5 cm;

blade oblong-ovoid to lanceolate, 2–4.5 × 0.5–1.5 cm, base cuneate, margins entire or proximal ones with few teeth, apex acute to acuminate, sparsely farinose.

lateral glomerules sessile on lateral branched spikes;

glomerules subglobose, 3–4 mm diam.;

bracts oblanceolate to linear, 0.2–1.5 cm.

glomerules in terminal and lateral spikes and panicles, 6–15 cm;

glomerules irregularly globose, 0.5–2 mm diam., flowers in different stages of development;

bracts absent.

perianth segments 3, connate almost to apex into 0.5–0.8 mm tube;

lobes deltate, 0.1–0.5 × 0.3–0.4 mm, membranous, apex acute, flat or occasionally keeled-corniculate, glabrous, green and covering fruit at maturity;

stamen 1;

stigmas 2, 0.2 mm.

perianth segments 5, distinct nearly to base;

lobes obovate, 0.5–0.7 × 0.5–0.7 mm, apex rounded, faintly keeled or not keeled, scarcely farinose, partly covering fruit at maturity;

stamens 5;

stigmas 2, 0.2 mm.

vertical and horizontal, ovoid, 0.6–0.9 mm diam., margins rounded;

seed coat black, smooth.

lenticular, margins round, 0.9–1.3 mm diam.;

seed coat black, reticulate-alveolate to smooth.

ovoid;

pericarp nonadherent, reticulate-punctate.

depressed-ovoid;

pericarp nonadherent, smooth.

= 18.