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Information glabrous, smooth. Erect, perhaps 2–3 feet high, paniculately branched, sparsely leafy; stems angular, minutely rough in the furrows. Lvs. 1–1 1/2 inch long, 1–2 1/2 lines wide, broadly linear, sub-acute, smooth, entire or denticulate, decurrent in narrow wings along the stem. Heads 3–6 together, on short pedicels, or subsessile. Invol. scales oblong-acuminate, smooth.

Information Annual or perennial herb (sometimes called a subshrub) 0.1–1 m high, aromatic; stems much branched, winged, scabrid and glandular or almost glabrous; wings 0.5–2 mm wide, entire or slightly serrate. Leaves sessile, linear to narrowly lanceolate, 1–7.5 x 0.1–1.4 cm, base decurrent, margins sparsely dentate, apex acute or apiculate, scabrid, glandular and viscid to almost glabrous. Capitula solitary or 3–6 together in corymbose cymes; involucre 3–4 mm high. Florets mauve or purple, the outer florets very many, 1.5–2 mm long; inner florets 20–30, 2.1–4 mm long and glandular, style long-exserted, purplish. Achenes cylindrical, 0.3–0.4 mm long, vestigial in inner florets; pappus absent in outer florets.

Information Annual or perennial herb (sometimes called a subshrub) 0.1–1 m high, aromatic; stems much branched, winged, scabrid and glandular or almost glabrous; wings 0.5–2 mm wide, entire or slightly serrate. Leaves sessile, linear to narrowlylanceolate, 1–7.5 cm long, 0.1–1.4 cm wide, base decurrent into the wings, margins entire or sparsely dentate, apex acute or apiculate, scabrid, glandular and viscid to almost glabrous. Capitula 3–7 mm long, solitary and terminal or 3–6 together in corymbose cymes; stalks of individual capitula 1–6(–15) mm long; phyllaries green and often with purplish tips, lanceolate to linear, 2–5 mm long, 0.6–1 mm wide, margins scarious and ciliate, apex acute to acuminate, scabrid and glandular. Florets mauve or purple, the outer florets stalked with the stalks connate into a rim up to 1 mm long surrounding the unstalked inner florets; outer florets very many, tube 1.5–1.9 mm long; style 2.2–2.6 mm long with filiform branches; inner florets 20–30, tube 1.8–3.3 mm long, slightly widening, distally glandular, lobes 0.3–0.6 mm long and glandular; anthers cream, 1.4–1.5 mm long with ovate distal appendages; style long-exserted, purplish, 3.5–6 mm long, minutely bifurcate with closely parallel branches. Achenes cylindrical, 0.3–0.4 mm long, vestigial in inner florets; pappus absent in outer florets. Fig. 77.

Information Heads many-flowered, homogamous. Involucre imbricate, scales herbaceous, acute. Receptacle naked. Corolla with a slender tube, and bell-shaped, equally 5-fid limb; lobes lanceolate, margined. Anthers short, included. Style shortly exserted, its branches subulate, bristly. Achenes inversely pyramidal, 4-angled, 4-ribbed, glabrous, glandular between the ribs, truncate, and 4–5-angled at the summit. Pappus an entire, thickened, marginal rim. Erect, branching, leafy, herbaceous plants. Leaves alternate, entire or serrated, pellucid-dotted. Flower-heads small, in a much-branched corymb. Flowers red or purple.