Flora of North America species comparison

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

erect to ascending, branched at base to ± simple, 1–6(–10) dm, pubescent with short-stalked glandular hairs.

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 2.5 mm;

blade 1.3–4 × 0.6–2.7 cm, base cuneate, margins lyrate-sinuate, pinnatifid, or occasionally entire (in distal leaves), apex acute to subobtuse, glandular-pubescent abaxially.

axillary glomerules;

glomerules subglobose, 1.5–2.5 mm diam.;

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

axillary cymes, often arranged in terminal thyrses, 12–24 cm, subtended by cauline leaves;

bracts absent.

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 elliptic or ovate to oblong, 0.7–1.1 × 0.5–0.7 mm, apex acute to obtuse, rounded abaxially, densely glandular-pubescent, covering fruit at maturity;

stamens 1–3(–5);

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.

globose to subglobose, (0.5–) 0.6–0.8 × 0.5–0.7 mm, margins rounded (rarely indistinctly furrowed);

seed coat rugose.

= 18.