1/2-1 1/2 ft. high; branches many, erect or divaricately-spreading, rigid, white-pubescent; leaves 3-nate, from suberect to spreading or squarrose, linear, lanceolate or elliptic, acute, sulcate or more usually open-backed, with rounded or revolute margins, thick, rigid, white-tomentose beneath, glabrous and glossy above, from 5-8 lin. long, 1/2-1 1/2 lin. wide; petiole long, pallid, adpressed, from 1/2 the length of the blade, to (in the smaller leaves) nearly as long; flowers 3-nate, often clustered in dense heads, subcalycine; pedicels 1 1/2 lin. long; bracts approximate, lanceolate, acute, cartilaginous, rigid, glabrous, white or pallid; sepals like the bracts, but ovate, acute or acuminate, wrinkled or striate, reaching a little lower than the top of the corolla, 1 1/2-2 lin. long; corolla cyathiform-urceolate, glabrous, white, 2-2 1/2 lin. long; segments deltoid and subobtuse, or broadly-rounded, recurved, 1/4-1/3 the length of the tube; filaments rather broad, often dilated, somewhat darkened and angled or bluntly toothed near the apex; anthers subexserted, terminal or subterminal, longitudinally semioval, subacute or obtuse, smooth, about 3/5 lin. long, muticous; pore 2/3 the length of the cell, style exserted; stigma capitate, toothed; ovary minutely hairy on the top.
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Erect shrublet to 50 cm. Flowers small, calycine, bell-shaped, white, hairy.