Annual: glabrous, aromatic, 5-25 cm, branching from base.

Stems: slender, ascending or erect, 1- or few-headed.

Leaves: pinnatisect into setaceous, entire or lobed segments.

Heads: discoid, 5-7 mm in diameter, pedunculate.

Involucral bracts: oblong, obtuse, with broad brown membranous entire margins.

Receptacle: ovoid-conical.

Achenes: minute (about 1 mm), 3-ribbed on ventral side,
epappose or with an obliquely truncate and lobed auricle as long as achene.