stem shrubby, robust, erect, sub-simple or branching, woolly, closely leafy below, ending in a laxly leafy, pedunculoid fl.-branch; leaves half-clasping, elliptical or oblong, nigro-mucronate, 3–5-nerved, above cobwebby becoming nude, beneath densely woolly and white; heads in a much-branched, corymbose cyme, homogamous, many-fl., pedicellate; inv. scales glabrous and glossy, loosely imbricating, snow-white, broadly ovate or oblong, sub-acute or obtuse. Stem robust, 3–4 feet high, denuded of leaves below, densely leafy above to within 6–12 inches of the summit, where the laxly leafy or naked flowering portion starts. Leaves 2–2 1/2 inches long, 1–1 1/2 inch wide, green above, spreading. Cyme 4–5 inches across; each head 5–6 lines diam. Scales radiating.—A much handsomer plant than H. grandiflorum, with which it has been confounded.
