About 1-5 m high, with villous upper branches and branchlets. Leaves sessile, closely set, about 4 mm long, erect-spreading, lanceolate or linear-lanceolate, subacute, narrowed towards the base, villous on the dorsal surface, slightly concave and glabrous on the ventral surface. Flower-heads 3-4 mm wide, solitary, spherical or rotund: flowers occasionally axillary. Bract ovate, villous on the dorsal surface, deeply concave and glabrous on the ventral surface. Calyx-tube villous, with a shallow cup-shaped upper part: calyx-lobes lanceolate, villous on the dorsal surface, reaching to the middle of the petals. Petals 1.25-1.5 mm long, oblong-obovate or elliptic, obtuse, cuneate at the base, glabrous, with short keels merging in a basal thickening. Stamens reaching to the upper half of the petals: anthers scarcely 0-5 mm long, rotund. Ovary 3/4 inferior, villous on the upper part, with 2 readily separable uniovulate chambers: styles free. Fruit 1-seeded.
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Like B. villosa but sepals villous and slightly larger anthers.
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