Annual herb with a woody taproot, primary stem very short, erect, subsequent branches many from the base, prostrate, ascending or erect, mostly 30-200 mm long, simple or sparingly to well-branched, slender, cobwebby, distantly or closely leafy. Leaves mostly 4-12 x 2-7 mm, linear, oblong-obovate, obovate or spathulate, base much narrowed, apex rounded to subacute, loosely white-woolly, sometimes glabrescent, glandular. Heads homogamous or heterogamous, campanulate, ±4-5 x 4-6 mm across the radiating bracts, many crowded in terminal glomerules surrounded by a few leaves. Involucral bracts in 5-6 series, subequal, loosely imbricate, outer pellucid, often tinged red-brown, webbed with wool, inner acute, subacute or obtuse, tips opaque or subopaque snow-white, sometimes tipped red-brown, sometimes with a reddish patch above the stereome, or sometimes the whole bract suffused pink, equalling or slightly exceeding the flowers, radiating. Receptacle smooth or nearly so. Flowers 9-42, 0-4 female, 9-40 homogamous. Achenes 0.75 mm long, obscurely ribbed, glabrous or with myxogenic duplex hairs. Pappus bristles many, equalling corolla, scabrid, bases with minute patent cilia, not cohering. Flowering recorded between March and December, but peak flowering from July to September.
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Prostrate or diffuse annual, with slender branches from a woody taproot. Leaves linear, obovate or spathulate, mostly 4-12 x 2-7 mm, mostly loosely woolly. Flowerheads in leafy glomerules, discoid or disciform, campanulate, 4-5 mm long, bracts 5-or 6-seriate, obtuse-cucullate and abruptly spreading above, white to reddish brown, woolly below, florets 10-40.
Like H. litorale but flower heads campanulate, white sometimes pinkish, ± 4-5 x 4-6 mm, involucral bracts obtuse, abruptly spreading above.
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