Flora of North America species comparison

erect or semierect, branched, 1–5.5 dm, glabrous or sparsely farinose.

erect, simple (or branched), 1–1.5(–10) dm, sparsely farinose.

nonaromatic;

petiole to 1 cm;

blade linear, 1-veined, 1–3(–5) × 0.1–0.2(–0.4) cm, somewhat fleshy, base cuneate, margins entire, apex acute to acuminate, glabrous.

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.

glomerules in terminal and axillary panicles, 6–25 × 5–20 cm, widely spaced, maturing at different times;

bracts variable.

glomerules in terminal and lateral spikes, 2.5–5(–7) cm;

glomerules ± spread out, maturing nearly the same time;

bracts unknown.

perianth segments 5, connate into 0.3–0.4 mm tube;

lobes ovate or orbicular-obovate, 1–1.4 mm, apex obtuse or rounded, cucullate, carinate, sparsely farinose, largely covering fruit at maturity;

stamens 5;

stigmas 2, 0.1 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.

ovoid;

pericarp nonadherent, smooth.

or occasionally utricles ovoid;

pericarp adherent, occasionally nonadherent, smooth.

ovoid, 1.2–1.6 mm diam., margins obtuse with narrow rim;

seed coat black, smooth, shiny.

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

seed coat black, finely rugulate.

= 18.

= 18.