Usually 40-50 cm high, much branched, with slender pubescent branchlets. Leaves 1.5-2.5 mm long and wide, alternate, spreading or slightly reflexed, cordate or reniform, subacute, slightly convex above, thickened and with large glands at the margin, slightly concave and without an evident nerve or glands beneath, glabrous, or at first hispidulous beneath. Flowers in terminal clusters. Peduncles 1 mm long, minutely puberulous, ebracteolate. Sepals 0.75 mm long, subrotund, very obtuse, expanded, concave above at the apex, ciliolate, with a conspicuous gland behind the apex. Petals 2.5-3 mm long, glabrous; blade narrowly obovate or elliptic, obtuse; claw almost as long, linear. Stamens glabrous. Staminodes 2 mm long, linear in the upper half, obtuse, filiform in the lower half, glabrous, with a conspicuous gland behind the apex. Disk crenulate. Ovary with 5 carpels bearing obovate or oblong obtuse sparsely hispidulous processes. Style ± pubescent.
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Tangled shrub to 1 m. Leaves broad, reflexed. Flowers in small, dense heads, white to purple. Fruits 5-chambered.