Flora of North America species comparison

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

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.

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.

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 glomerules 1.8–3.5 mm diam.;

bracts similar to cauline leaves.

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 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).

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.

obovoid;

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

subglobose;

pericarp adherent, membranaceous, finely granular.

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

seed coat smooth.

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

seed coat smooth.