Erect, strongly aromatic annual herb, to 0.5 m tall; stems sparsely pilose to pilose or sometimes glabrous. Leaves bipinnatisect to tripinnatisect, lanceolate to oblanceolate, 10-40 x 5-15 mm, sometimes succulent, sparsely pilose to pilose; lobes oblong to lanceolate, 1 x ±1 mm, mucronulate. Capitula discoid, homogamous, congested, compound corymbs; peduncles slender, 5-10 mm long, glabrous to sparsely pilose. Involucre campanulate, 3-5 mm diam., base rounded or sometimes shallowly cordate in mature heads; involucral bracts 3-seriate, slightly deflexed at anthesis, never decurrent on the peduncle, extending above receptacle apex, midvein inconspicuous, glabrous, margins and apices broadly scarious; outer series ovate to broadly ovate, ±1.8 mm long; median series oblong to broadly elliptical, 2-3 mm long; inner series bracts elliptical, ±2 mm long. Receptacle conical, obscured by involucral bracts. Disc florets bisexual, corolla 1.0-2.5 mm long, yellow; tube conspicuously swollen from apex to base, lanceolate to oblong, ±1.4 mm long; limb campanulate, ±1 mm long; lobes ovate, ±0.5 mm long. Pappus inconspicuous to small, irregularly lobed, ±0.1-0.2 mm long. Flowering is in spring to early summer (September to December).
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Erect or sprawling, often much-branched, aromatic annual, up to 500 mm tall. Leaves bi-to tripinnatisect, (10-)20-80 mm long, thinly or more densely hairy. Flowerheads several to many in dense rounded or flat-topped corymbs, discoid, yellow, 4-6 mm diam.; involucral bracts glabrous.
Much-branched, aromatic annual to 50 cm. Leaves bi-to tripinnatisect. Flower heads discoid, many in dense corymbs, yellow.
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