Home
Plants annual. Stems erect to ascending, much-branched, 3-10(-15) dm, ± glandular-pubescent. Leaves 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). Inflorescences 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. Flowers: 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. Achenes ovoid; pericarp nonadherent, rugose to smooth. Seeds horizontal or vertical, reddish brown, ovoid, 0.6-1 × 0.4-0.5 mm; seed coat rugose to smooth.
Perennial herb c. 1 m high, strongly aromatic. Branches glabrous or almost so. Leaves elliptic to narrowly elliptic, coarsely serrate or incised, narrowed at base into short petiole, in all c. 10 cm long; undersurface with sessile globular oil-filled hairs. Flowers in small glomerules forming leafy or leafless panicles. Terminal flower of glomerule bisexual; perianth deeply 5-lobed, glabrous; lobes cucullate; stamens 5; ovary pubescent above with shortly stipitate geniculate hairs. Lateral flowers female; perianth depressed, shortly 5-toothed. Pericarp free. Seed horizontal or oblique, obtusely lenticular, c. 1 mm diam., smooth, glossy; embryo horseshoe-shaped.
Annual herb, 0.25-1.00 m high, upright, much branched. Leaves mostly lanceolate; inferior leaves with coarse, irregular ascending teeth on each margin, up to 140 x 45 mm; superior leaves becoming smaller. Inflorescences of ample, much-branched panicles of small, sessile clusters of flowers arranged spicately, mostly bracteate. Perianth segments 3-5. Flowering time Sept.-Apr. Pericarp membranous, easily removed. Seeds red-brown.
Annual herb, up to 1 m high. Stems erect. Leaves with blade oblong, ovate-lanceolate, irregularly sinuately repand, up to 100 x 40 mm, margins entire, dentate or laciniate, upper surface glabrous, lower surface covered with sessile, yellow glands. Flowers: in many-clustered, false spikes or pseudopanicles; perianth segments ovate-triangular, remaining green for a long time; Oct.-Apr.
Erect herb, up to 1 m high. Leaves lanceolate, up to 100 mm long and 40 mm broad, margins entire, dentate or laciniate, upper surface glabrous, lower surface covered with sessile yellow glands. Inflorescences axillary spikes. Flowers green.
