Fruit obovate to oblong-obovate, 7–12 × 5–8 mm., thinly pilose throughout; stylopodia conical, not exceeding the apical notch of the fruit; styles arcuate-recurved, 1.5–2 mm.; vittae 4 dorsally, 2 on the commissure, all reaching to near the base or the commissural somewhat shorter.
Flowers white or creamy, the outermost petals of the outer partial umbels slightly radiate, cordate, 1.5–3 mm.; inner petals oblong-obovate with an incurved tip, ± 1.25 mm.
Calyx-teeth narrowly triangular to linear, sometimes persistent in fruit, ± 0.5 mm.
Umbels several, on sulcate peduncles 2.5–12 cm. long; rays (4–)6–18, sulcate, densely pilose, 1.5–6 cm.; involucre usually present but sometimes very small, of ± 3–6 narrowly linear or broader bracts mostly ± 3–10 mm. long; partial umbels ± 15–35-flowered, pedicels 3–10 mm., commonly furnished with dense and broad-based tuberculiform hairs and fewer, clearly marked off, longer glandular hairs, sometimes with short tuberculiform hairs only; involucels of 4–9 linear bracteoles 2–7 mm. in length, rarely exceeding the pedicels in young fruit.
Basal leaves several, ± narrowly oblong in outline, ± 8–23 × 2–8 cm., simply pinnate with 3–7 pairs of roundish to ovate or broadly deltoid, 1–4.5 × 0.8–5 cm. irregularly incised-dentate to subpinnatifid leaflets, teeth blunt to subacute, mucronate; indumentum ± generally distributed over both surfaces but densest on the veins and margins; sheaths striate, rather narrow, ± 1.5–3 × 0.8–1 cm.; petiole ± 4–11 cm.; median stem leaves shortly petiolate or sessile on the sheaths, leaflets similar or more sharply dentate and/or with narrower segments; sheaths not very broad and inflated, ± 1–2.5 × 0.8–1 cm.; uppermost leaves much reduced, often with a very small lamina; sheaths small, up to ± 2 × 0.8 cm.
Perennial, 0.2–1.8(–2.5 when growing in and supported by bushes) m., with fistular, sulcate-striate, densely pilose stems; stems 3–8 mm. wide below, simple or frequently with one or more long, ascending branches from the lower half upwards, branches with much-reduced leaves.
Leaves sheathing at the base; petiole approximately 1/3 the total length of the leaf.
Leaves up to 30 × 7 cm., simply pinnate, mostly basal, with 3–7 pairs of ovate-deltate leaflets and 1 terminal one.
Vittae 1 in each interval and 2 in the commissural face.
Stem terete, solid, rather coarsely striate with clearly marked ridges, often purplish especially near the base, covered with numerous short, erect bristly hairs some of which are glandular; the base covered with fibrous remains of old leaf bases.
Perennial or biennial herbs with fleshy to woody taproots, up to c. 1 m. tall.
Petiole and rhachis with hairs similar to those on the stem; superior surface of the leaflets with scattered, short, fine appressed hairs; inferior surface nearly glabrous with a few hairs on the veins only; margin with a fringe of short spreading hairs.
Inflorescence of terminal and lateral compound umbels. Rays 7–14, subequal; bracts 0-several, small, linear and inconspicuous. Partial umbels with 10–20 flowers, mostly hermaphrodite but sometimes with a small group of male flowers at the centre; bracteoles 0-few, similar to the bracts; pedicels relatively robust.
Petals white, the outer ones more or less radiate.
Fruit c. 9 × 5 mm., obovate, strongly dorsally compressed; calyx teeth obsolete; stylopodium conical with somewhat lobed base; styles 1·5 times as long as the stylopodium, tending to fall in fruit. Fruit wings well developed and forming a notch in which the stylopodium is situated at maturity. Dorsal ridges filiform.