Description from Flora of China
Haploseseli alepidioides H. Wolff & Handel-Mazzetti, Symb. Sin. 7: 722. 1933.
Plants 40–70 cm. Stem branched. Basal petioles 4–10 cm, narrowly winged, sheaths narrow; leaf blade obovate or obovate-lanceolate, ca. 8 × 2–3 cm, simple, base cuneate, margin sparsely serrate. Umbel to 12 cm across; peduncles 15–25 cm, scabrous; bracts 4–7, lanceolate or oblong, 5–15 mm, apex 2–3-lobed, margin dark purple; rays 6–13, 2.5–8.5 cm, unequal; bracteoles several, ovate-lanceolate, 2–3.5 × 1–1.5 mm, entire or 2–3-lobed at apex; pedicels 2–4 mm. Calyx teeth minute, ovate-triangular, ca. 0.2 mm. Petals broadly elliptic to obovate, white, 1.5–1.8 mm, apex obtuse. Young fruit ovoid, ca. 2 × 1.8 mm, lateral furrows wider than the dorsal; ribs prominent, somewhat verucose; vittae 3 in each furrow, 4 on commissure. Seed face plane. Fl. and fr. Jul–Oct.
This unusual, poorly known taxon is recorded only from a few collections.
Open forests, grasslands; 2200–3300 m. SW Sichuan.