Hyalolaena trichophylla (Schrenk) Pimenov & Kljuykov

Plants 30–70 cm, glabrous or subglabrous. Rootstock fusiform. Basal petioles 2.5–4 cm; blade 2–3-pinnate; primary pinnae 5–8 pairs; ultimate segments filiform, 3–5 × 0.2–0.3 mm. Umbels 2–5 cm across; bracts oblong, ca. 10 mm; rays 8–15, 1–4 cm, unequal; bracteoles oblong, whitish membranous, shorter than pedicels, 3-nerved; umbellules 8–15-flowered. Fruit 1–3 × 1–1.5 mm; ribs scabridulous; vittae solitary in each furrow, 2 on commissure. Fl. and fr. Jun–Jul.