Flora of North America species comparison

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

erect, simple (or branched), 1–1.5(–10) dm, sparsely 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 0.4–0.7 cm;

blade ovate-lanceolate, 3-veined, (1–)1.4–2.4(–4) × (0.05–)0.5–1.1(–2) cm, base cuneate, margins entire or with 1–2 teeth below middle (several teeth), apex acute to acuminate, 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, 2.5–5(–7) cm;

glomerules ± spread out, maturing nearly the same time;

bracts unknown.

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 elliptic or narrowly ovate, 0.7–1 × 0.5–0.7 mm, apex acute, keeled, farinose, covering fruit at maturity;

stamens 5;

stigmas 2, length unknown.

or occasionally utricles ovoid;

pericarp adherent, occasionally nonadherent, smooth.

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

seed coat black, smooth.

round, (1.1–)1.2(–1.4) mm diam., margins rounded;

seed coat black, finely rugulate.

ovoid;

pericarp nonadherent, reticulate-punctate.

= 18.