Plants glabrous throughout, pale green. Stem slender, many-branched. Lower leaves long-petiolate, sheaths slightly dilated; leaf blade triangular, 2-pinnate; pinnae pinnatifid, with 2–7 narrow linear segments, thinly coriaceous. Segments of stem leaves much longer than those of basal leaves, upper leaves 1–3-divided, petioles wholly sheathing. Synflorescence little-branched; peduncles elongate; bracts absent; rays 3–6, rigid, unequal; bracteoles 8–10. Pedicels very short. Calyx teeth obsolete. Petals white, broadly obovate. Fruit ellipsoid, small; dorsal ribs filiform, obtuse, lateral ribs narrowly winged, closely appressed to one another; vittae 3 in dorsal furrow, 2–3 in lateral furrows, 6 on commissure. Fl. and fr. Jul–Sep.

This species is recorded only from the holotype (E. H. Wilson 3705, P).

Mountain slopes; ca. 2900 m. N Sichuan (Songpan).