stem suffruticose, cobwebby-tomentose, branching, branches cobwebbed or nude, corymbiferous; leaves half-clasping and often unidentate at base, linear-subulate or linear-lanceolate, subpungent-mucronate, with revolute or recurved margins, either entire or sparingly toothed, or some furnished with a pair of opposite, horizontal lobes, scabro-punctulate and glabrate (cobwebbed) above, albo-tomentose beneath; corymb branching, loosely many-headed, the pedicels longish, scaly; heads 40–60 fl., radiate; inv. calycled, of 12–15 glabrous, barbellate scales; rays about 12, yellow; achenes nearly glabrous, or minutely puberulous. Stems rigid and strong, but scarcely ligneous, except at base; the branches numerous, more herbaceous, but wiry. Branches and leaves more or less cobwebby, becoming nude. The leaves vary in length and breadth and degree of expansion, and in being sparingly toothed or entire; I find them constantly scabrous-dotted above, even in var. salicinus (Drege's specimens). Drege's var. “ subserratus ” appears to me to belong rather to S. pterophorus. Inflorescence generally widely spreading varying very much, however, in the number of heads. Var. δ. cruciatus, is rather a monstrosity than a genuine form.