stem shrubby, robust, branches virgate, thinly canous; leaves sessile, linear, with strongly revolute margins, mucronate, at first cobwebby, afterwards glabrate above, tomentose beneath; heads very many, in densely much-branched, flat-topped cymes, subsessile, 5-fl. (4 herm., 1 fem.), cylindrical; inv. scales glossy, semi-pellucid, appressed, imbricated, oblong, subacute, pale lemon-yellow or straw-colour. 1–2 feet high, with many long, virgate, closely leafy branches. Leaves spreading or reflexed, 7–9 lines long, 1/2– 3/4 line wide, the whole under surface often completely hidden by the strongly revolute margins. Heads 1 1/2–2 lines long, not unlike those of H. parviflorum, but heterogamous, with rather more acute scales. Still more nearly allied to H. hamulosum.
