Flora of North America species comparison

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

prostrate, branched, 3–5 dm, pilose and glandular-pilose, or with sessile glands.

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 0.7–1 cm;

blade ovate or elliptic, 1.3–2.1 × 1.1–1.5 cm, reduced somewhat in inflorescence, base cuneate, apex obtuse, glandular-pubescent.

axillary glomerules;

glomerules subglobose, 1.5–2.5 mm diam.;

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

axillary glomerules;

glomerules subglobose, 4–6 mm diam.;

bracts similar to cauline leaves, elliptic, reduced to 0.8 mm, margins crenate-dentate, apex obtuse.

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 portions elliptic to oblong, strongly keeled, 1.8–1.9 × 0.3–0.5 mm, apex acuminate, fimbriate and hirsute, pubescent with septate hairs, hardly enclosing fruit, becoming white, strongly crested and 5-winged vertically, rostrate, semiorbiculate, and cartilaginous in fruit;

stamen 1;

stigmas 2.

ovoid;

pericarp adherent, membranaceous, slightly rugose.

ovoid;

pericarp adherent, membranaceous, slightly rugose and papillate.

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

seed coat smooth.

reddish brown, ovoid, 0.6–0.7 × 0.5–0.6 mm, margins slightly keeled over radicle and grooved over cotyledons;

seed coat smooth.