Flora of North America species comparison

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

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).

blades with margins entire to pinnatifid.

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.

linear-spicate or spicate-paniculate, ± foliose with flowers clustered in dense glomerules.

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 (3–)4–5, connate basally;

stamens 4–5;

styles (2–)3(–5).

ovoid;

pericarp nonadherent, rugose to smooth.

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

seed coat rugose to smooth.

mostly horizontal (vertical in D. chilensis, sometimes vertical in D. ambrosioides and D. anthelmintica).