Flora of North America species comparison

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

erect or ascending to decumbent, branched from base, 1–4.5 dm, sparsely to densely 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.

aromatic;

petiole 0.4–1.4 cm;

blade broadly rounded-triangular to rounded-rhombic or ovate, 1–2.6 × 0.5–2.9 cm, base rounded or subtruncate or broadly cuneate, margins entire or proximal leaves with 1–2 teeth on each side at base, apex rounded to obtuse or acute or apiculate, densely farinose on both surfaces.

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

bracts variable.

glomerules in paniculate spikes, 14–24 × 2–3 cm, maturing irregularly;

bracts leaflike.

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, connate into 0.3 mm tube;

lobes ovate, keeled, 1–1.4 × 0.9–1.2 mm, apex acute to obtuse, farinose, enclosing fruit at maturity;

stamens 5;

stigmas 2.

ovoid;

pericarp nonadherent, smooth.

ovoid;

pericarp adherent, usually strongly whitened, honeycombed.

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

seed coat black, smooth, shiny.

subglobose, 0.9–1.3 mm diam., margins obtuse;

seed coat whitened, coarsely honeycombed.

= 18.

= 18.