Like B. squalida but leaves linear-elliptic, ± 2 mm long, hairy on upper surface and flowers few in small heads, white.
About 65 cm high, with tomentose branchlets. Leaves sessile, appressed, about 2 mm long, elliptic, apiculate, rounded-convex and at first pubescent on the dorsal surface, concave and pubescent on the ventral surface. Flower-heads mostly 4-5 mm wide, spherical. Bract and bracteoles slightly shorter than the flower, spathulate, densely villous on the dorsal surface. Calyx-tube villous, with a cup-shaped free upper part: calyx-lobes almost as long as the petals, lanceolate, densely villous on the dorsal surface, glabrous on the ventral surface. Petals about 2-5 mm long, linear-oblong, subacute, rounded-convex and villous on the dorsal surface, concave and sparsely pubescent on the ventral surface. Stamens shorter than the petals: anthers elliptic. Ovary J inferior, villous, with 2 uniovulate chambers: styles free. Fruit unknown.