Pimpinella huillensis Welw. ex Engl.

Slender to more robust (biennial or ?) perennial herb, 0.6–2 m., with a globose to carrot-shaped tuberous root.. Stem terete, glabrous, finely striate, simple or with few branches below, the inflorescence considerably branched with the branches increasingly slender.. Basal leaves with a broadly cordate to cordate-oblong rarely trisect lamina ± 3.5–11.5 × 2.5–11 cm., regularly sharply serrate or crenate with large-celled, often ± scabrid teeth, glabrous to thinly pilose on the upper surface, pilose on the nerves and sometimes the surface beneath (rarely glabrous), palmately nerved; petioles to ± 15 cm., slender, often reddish, shortly pilose or rarely glabrous except just below the lamina; sheaths broad, almost surrounding the stem, 1.5–3 cm., ± ciliate-margined; median stem leaves similar but usually smaller and progressively more shortly petiolate and finally sessile on the long (to ± 5 cm.) sheaths, the lamina sometimes broadly trifid to trisect or subdigitate with linear to oblong toothed segments, the terminal segment usually larger; uppermost leaves very reduced, the lamina very small, generally pinnatifid with linear segments, sessile on the rapidly reducing, usually increasingly ciliate sheaths.. Umbels of 5–14 (rarely 20–30), ± sulcate, glabrous rays 0.5–2.3 cm. long, the rays frequently closing together as fruit develops; involucre absent; partial umbels ± 7–15(–± 30)-flowered, flowers all hermaphrodite or some apparently functionally ♂ (sometimes entire partial umbels); pedicels (0.5–)2–7 mm., glabrous or with a few scattered scabrid or subvesicular hairs; involucel absent; peduncles 1–5 cm.. Calyx absent.. Petals ± 0.75–1 mm., white to creamy, sometimes flushed with red, broadly obcordate to subquadrate-incised, ± pilose dorsally or more rarely glabrous.. Ovary densely white-pilose.. Fruit ovoid, laterally compressed, ± 2–2.25 mm., covered with short but slender to broader and sometimes subvesicular hairs; stylopodia yellowish to purplish red, flattish to rounded-conical in the ripe fruit; styles 0.5–0.75 mm., divergent, glabrous, yellowish to purplish red.. Fig. 20/5, p.59.