Flora of North America species comparison

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

erect, branched, 3–15 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 0.15–0.45 cm;

blade ovate to triangular, 3.5–15 × 2–9 cm, base cordate to truncate, margins sinuate-dentate with 1–5 coarse, acute teeth, distal leaves entire or with few small teeth, apex acute, glabrous.

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

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, connate into 0.5 mm tube;

lobes ovate to lanceolate, 0.7–1 × 0.4–0.6 mm, apex retuse, slightly keeled, glabrous, margins meeting or separated by as much as their width, exposing more than 1/2 fruit at maturity;

stamens 5;

stigmas 2, 0.1 mm.

depressed-ovoid;

pericarp adherent, chartaceous, smooth.

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

seed coat black, smooth.

lenticular, 1.3–1.9 mm diam.;

seed coat black, indistinctly honeycombed to nearly smooth, margins rounded.

ovoid;

pericarp nonadherent, reticulate-punctate.

= 18.