Shrubs small, erect, 35--100 cm. Stems simple or branched; branches shallowly 10-grooved, sparsely puberulous to subglabrous. Leaves simple or ternate; petiole 0.4--4.5 cm; leaf blade or leaflet blades lanceolate, oblong-lanceolate, or linear-lanceolate, 4--14 × 1--2.4 cm, leathery, both surfaces very sparsely puberulous to subglabrous, base cuneate, broadly cuneate, or rounded, margin entire, apex obtuse to ± acute; basal veins abaxially ± prominent. Cymes terminal, 3--5-flowered; bracts foliaceous or small and linear, 3--10 mm. Flowers ca. 2 cm in diam. Pedicel 2--5.5 cm. Sepals 4--6, white, spreading, narrowly oblong, ca. 10 × 3 mm, abaxially glabrous except for velutinous margin, adaxially glabrous, apex ± acute. Stamens 5.5--8 mm, glabrous; anthers narrowly oblong, 3.2--5.5 mm, apex minutely apiculate or obtuse. Ovaries pubescent. Style 5--7 mm, densely villous. Achenes narrowly ovate to elliptic, 4--5 × 2.2--3 mm, pubescent; persistent style 1.4--2.3 cm, plumose. Fl. Jul--Aug, fr. Sep--Oct.
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