Plants 40–90 cm. Stem few-branched above. Basal petioles 5–20 cm; blade broad-triangular or rounded, 8–10 cm, width equaling or longer than the length, ternate-2-pinnate; pinnae 3–5; ultimate segments broad-ovate or obovate-oblong, 4–8 × 3–7 cm, base cuneate, glabrous on both surfaces, coarsely mucronate-dentate. Cauline leaves few, ternate-2-pinnate or 3-lobed. Terminal umbels ca. 6 cm across, lateral umbels smaller; rays 11–15, 2–3.5 cm, apical parts roughened; umbellules ca. 15 mm across. Petals white, purple-red nerves several. Styles ca. 2 × stylopodium. Fruit oblong, 3–3.5 × 2–2.5 mm. Fl. May.
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