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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 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.
Perennial herb or shrub, up to 1 m high; aromatic. Stems winged. Leaves alternate, sessile; blade narrowly elliptic to linear-oblong, up to 50 x 10 mm, apex acute, base decurrent on stem as wings, margins entire or remotely denticulate; gland-dotted, glabrous to glandular-scabrid. Heads disciform, small, few together in subumbellate clusters, terminating side branches, shortly pedunculate. Involucral bracts in many series, imbricate, apices often purplish. Flowers: outer female florets in many rows, filiform; disc florets functionally male; both purple; Nov.-Jun. Fruit with cypsela cylindric, 5-ribbed. Pappus absent or 2 or 3 bristles in disc cypsela.
Roughly hairy or rarely subglabrous subshrub, with erect stems, up to 500 mm tall, from a woody rootstock. Leaves narrowly elliptic, 15-25 mm long, denticulate, decurrent, roughly-and glandular-hairy. Flowerheads few, subsessile in terminal clusters or glomerules, disciform, mauve to purple, 3-5 mm diam.; involucral bracts apiculate, flushed purple at tips.
Perennial herb or shrub, up to 1 m high. Stems winged. Leaves lanceolate to oblong, sessile, gland-dotted, margins entire or remotely denticulate. Heads small, few together in subumbellate clusters terminating side branches. Flowers purple.
A herb or shrub. It grows 1 m tall. The stems are branched and have wings. The leaves are alternate and without stalks. They are narrowly oblong and 5 cm long by 1 cm wide.
