Grey-woolly, annual herb. Stems 15-150 mm long, many from the crown, slender, prostrate, often ± red, distantly leafy, leaves crowded under capitula and at crown. Leaves: radical leaves often withered at flowering, 15-30 x 5-10 mm, oblong-elliptic to spathulate; cauline leaves similar but smaller, often folded lengthwise, apex recurved. Capitula heterogamous, campanulate, 3-4 x 2.0-2.5 mm, in terminal glomerules 5-15 mm in diam.; involucral bracts in 3 or 4 series, outer webbed to leaves, inner dull yellow, orange or red. Flowers 20-37, yellow, sometimes tipped red. Flowering time July-Oct., mainly Sept. Pappus of bristles, barbellate above, scabrid below. Cypselae 0.75 mm long, with duplex hairs or glabrous.
Mat-forming annual, with slender, sparsely leafy branches except under flowerheads. Leaves oblong-elliptic to spathulate, folded, mostly 15-30 x 5-10 mm, apex recurved, loosely grey-woolly. Flowerheads in leafy, terminal glomerules, disciform, campanulate, ± 3-4 mm long, bracts 3-or 4-seriate, acuminate and squarrose, inner caducous, translucent golden or reddish, woolly below; florets 20-40.
Mat-forming, grey-woolly annual like H. litorale but heads smaller, ± 3-4 x 2.0-2.5 mm, involucral bracts acuminate and hooked, and pappus uniseriate.