Flora of North America species comparison

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

erect to ascending, unbranched, 2.5–7.5 dm, somewhat viscid and farinose.

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 1–12 cm;

blade triangular to broadly hastate, 4.5–10 × 3–9 cm, base truncate, cordate, or hastate, margins entire, apex acute (acuminate), adaxially sparsely farinose.

lateral glomerules sessile on lateral branched spikes;

glomerules subglobose, 3–4 mm diam.;

bracts oblanceolate to linear, 0.2–1.5 cm.

dense glomerules sessile on terminal and axillary spikes, spikes 5–19 cm;

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

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 connate into 0.4–0.6 mm tube, lobes oblong or elliptic, 0.8–1.5 × 0.5–1.1 mm, apex obtuse, rounded or truncate, scarcely abaxially keeled throughout, glabrous, not covering fruit at maturity;

stamens (4–)5;

stigmas 2–4.

obovoid;

pericarp adherent, ± smooth.

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

seed coat black, smooth.

obovoid or rotund, 1.5–2 mm in diam. margins not rounded;

seed coat black, rugose.

ovoid;

pericarp nonadherent, reticulate-punctate.