Flora of North America species comparison

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

erect, [very bushy-branched] profusely branched from base to ± simple, [0.4–]0.7–2.5[–5] dm, glabrous or with scattered inflated hairs and uniseriate nonglandular trichomes, especially towards base.

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).

non-aromatic;

petiole to 0.4 mm;

blade [0.8–]2.8–3.4[–4.1] × 0.1–0.3[–0.6] cm, base attenuate, margins entire (to occasionally shallowly erose-dentate), apex acute, mucronate, glabrous 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.

a terminal thyrse, 2.2–4.5[–13] cm, or lax, pyramidal cymes, bearing flowers almost from base;

bracts absent.

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 portions obovate to elliptic or ovate, with low tubercle or sometimes keeled abaxially, 0.5–0.7 × 0.3–0.4 mm, apex obtuse to subacute, glabrous, loosely covering fruit at maturity;

stamens 5 (or absent in pistillate flowers in distal portion of inflorescence);

stigmas 2.

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

seed coat rugose to smooth.

subglobose, 0.5–0.8 × 0.4–0.5 mm, margins rimmed;

seed coat smooth.

ovoid;

pericarp nonadherent, rugose to smooth.

subglobose;

pericarp adherent, membranaceous, finely granular.