A delicate herb forming tangled mats, main branches up to 120 mm long, filiform, creeping, rooting, thinly greyish-white woolly, distantly leafy. Leaves mostly 5-25 x 1.5-8 mm, up to half the length petiolar, blade elliptic, apex obtuse to subacute, mucronate, base tapering into petiole, both surfaces thinly grey-woolly, upper glabrescent or nearly so. Heads heterogamous, campanulate, c. 3-4(-5) x 1.5-2 mm, solitary or few on filiform, loosely woolly peduncles subcorymbosely arranged. Involucral bracts in 3 series, backs loosely woolly, inner two series subequal, exceeding flowers, tips elliptic, obtuse, opaque milk-white, radiating. Receptacle shallowly tubercled. Flowers 13-28, 2-7 ('female'), 10-22 ('bisexual'). Achenes c. 0.75 mm long, usually dimorphic, those of ('bisexual') flowers hairy, of ('bisexual') flowers glabrous, or rarely all hairy. Pappus bristles many, about equalling corolla, tips subplumose with clavate hairs, shaft barbellate, bases cohering by patent cilia.
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Delicate, white-woolly annual to 15 cm. Leaves petiolate, ovate, pale green and glabrescent above. Flower heads discoid, few, subracemose, white to purple, heterogamous.