Flora of North America species comparison

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

prostrate or ascending, much-branched, 1.5–7 dm, densely puberulent.

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.

nonaromatic;

petiole absent or indistinguishable from blade;

blade oblong to elliptic, 0.6–4.5 × 0.1–1(–2) cm, base narrowly cuneate, margins deeply and irregularly pinnatifid with narrow, linear lobes, sometimes only dentate, apex acute to obtuse, glandular-pubescent abaxially.

axillary glomerules;

glomerules subglobose, 1.5–2.5 mm diam.;

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

lateral glomerules 1.8–3.5 mm diam.;

bracts similar to cauline leaves.

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 (4–)5, connate for most of their length, urceolate, tube with distinct reticulate veins, distinct portion 0.1–0.5 mm, margins dentate, apex rounded to broadly acute, accrescent and coriaceous with age, enclosing fruit;

stamens 5;

stigmas (2–)3(–5).

ovoid;

pericarp adherent, membranaceous, slightly rugose.

obovoid;

pericarp loosely adherent, membranaceous, with many yellow glandular hairs near apex, otherwise smooth.

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

seed coat smooth.

vertical, suborbicular to ovoid, 0.8–1.3 × 0.8–1 mm;

seed coat smooth.