Flora of North America species comparison

erect to ascending, much-branched, 3–10(–15) dm, ± glandular-pubescent.

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

aromatic, distal leaves sessile;

petiole to 18 mm;

blade ovate to oblong-lanceolate or lanceolate, proximal ones mostly lanceolate, 2–8(–12) × 0.5–4(–5.5) cm, base cuneate, margins entire, dentate, or laciniate, apex obtuse to attenuate, copiously gland-dotted (rarely glabrous).

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.

lateral spikes, 3–7 cm;

glomerules globose, 1.5–2.3 mm diam.;

bracts leaflike, lanceolate, oblanceolate, spatulate, or linear, 0.3–2.5 cm, apex obtuse, acute, or attenuate.

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 4–5, connate for ca. 1/2 their length, distinct portion ovate, rounded abaxially, 0.7–1 mm, apex obtuse, glandular-pubescent, covering seed at maturity;

stamens 4–5;

stigmas 3.

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 nonadherent, rugose to smooth.

subglobose;

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

horizontal or vertical, reddish brown, ovoid, 0.6–1 × 0.4–0.5 mm;

seed coat rugose to smooth.

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

seed coat rugose.