Flora of North America species comparison

erect to ascending, branched, 3–5.5 dm, pilose with glandular trichomes or sessile glands.

erect, 2.3–5.2 dm, sparsely pubescent with short hairs, these rarely with gland heads.

aromatic;

petiole 0.5–1.4 cm;

blade ovate to broadly ovate, 0.9–1.6 × 0.8–1.4 cm, somewhat reduced in inflorescence, base cuneate to truncate, apex acute, glandular-puberulose and pilosulose on veins.

aromatic;

petiole to 1.3 mm;

blade 1.7–4.5 × 0.7–2.6 cm, base cuneate, margins pinnatifid or entire (in distal leaves), apex acute to acuminate, mucronate, with sessile glands adaxially.

axillary glomerules;

glomerules subglobose, 1.5–2.5 mm diam.;

bracts leaflike, ovate, 3–5 mm, margins crenate-dentate, apex acute.

terminal compound cymes, 8.5–22 cm;

bracts leaflike, lanceolate, 2.1–10.3 × 0.1–0.6 mm, generally absent in fruit.

perianth segments 5, distinct nearly to base, distinct portions narrow-oblong, prominently keeled especially apically, 0.8–0.9 × 0.3–0.4 mm, apex acute, not crested, covered with septate hairs, becoming coriaceous and white in fruit;

stamens absent or 1;

stigmas 2.

perianth segments 5, distinct nearly to base, distinct portion ovate, with large single tubercle abaxially near apex, 0.5–0.7 × 0.35–0.6 mm, apex acuminate, with sessile golden glands, covering seed at maturity;

stamens 1(–2);

stigmas 2.

ovoid;

pericarp adherent, membranaceous, slightly rugose.

subglobose;

pericarp adherent, membranaceous, papillose, becoming rugose, usually white-blotchy.

reddish brown, ovoid, 0.6 × 0.3–0.4 mm, margins keeled over radicle and channeled over cotyledons;

seed coat smooth.

subglobose, 0.6–0.9 × 0.5–0.7 mm, margins rimmed;

seed coat rugose.