Annual herb sometimes flowering in seedling stage, then stem erect, 15-20 mm long, or when well-grown forming small mats up to 80 mm across, then stems prostrate or decumbent, filiform, simple or branched, clothed in thin 'tissue-paper' indumentum, glabrescent, distantly leafy. Leaves 3-8 x 0.5-0.75 mm, radical leaves longest, linear-lanceolate, acuminate, conspicuously white mucronate, margins involute, lower surface glabrous or with thin 'tissue-paper' indumentum, soon glabrescent, upper surface thinly and persistently appressed white-woolly. Heads cylindric-campanulate, c. 3 x 2 mm, solitary or 2-3 together, closely surrounded and overtopped by leaves, the minute branchlets bearing the heads often crowded towards the tips of the main branches or racemosely arranged. Involucral bracts in c. 3 series, generally surrounding both female and hermaphrodite flowers, or occasionally one female flower outside main involucre and subtended by a cymbiform bract, bracts all straw-coloured, translucent, acuminate, glabrous. Flowers 15-38; 11-35 female, corollas filiform, 2-7 hermaphrodite, corollas cylindric, all fertile. Achenes 0.75 mm long, hairy. Pappus generally present on both female and hermaphrodite flowers, patent intermingling cilia at base, shaft naked, tip shortly plumose; or absent in female flowers that occur outside main involucre. The plants are very small and delicate and are easily overlooked.
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Small, erect or mat-like annual, stems up to 150 mm long. Leaves distant, linear-lanceolate, acuminate, white-mucronate, upper surface appressed white-woolly, margins rolled in. Flowerheads very small, disciform, 1-3 nested among leaves; involucral bracts straw-coloured, glabrous; outer female florets filiform, 11-35; bisexual florets 2-7. Cypselas hairy; pappus of naked bristles with plumose tips, occasionally absent in female florets.
Erect or mat-like, thinly white-membranous annual to 15 cm. Leaves distant, linear-lanceolate, margins revolute, white-mucronate. Flower heads discoid, 1-few, nested among leaves, straw-coloured; florets cylindrical.