Rhodosciadium nudicaule (Coult. & Rose) Drude

Rhodosciadium nudicaule (Coult. & Rose) Drude in E. & P
Nat. Pfl. 3 8 : 223. 1898.
Deanea nudicaulis Coult. & Rose, Bot. Gaz. 20: 372. 1895.
Rather slender, from a branched tuberous rootstock bearing old leaf-sheaths, 3-6 dm. high, the foliage and inflorescence often scaberulous; leaves deltoid in general outline, excluding the petioles 5-20 cm. long, biternate or ternate-pinnate, the leaflets ovate, acute to obtuse at the apex, truncate to cuneate at the base, distinct or the terminal confluent, sessile to petiolulate, 1.5-4 cm. long, 1-2.5 cm. broad, sharply serrate and incised to divided at the base, glabrous, or scaberulous on the veins; petioles slender, 2-14 cm. long; cauline leaves ternate; inflorescence branched, the lower peduncles alternate, the peduncles slender, 8-24 cm. long; involucre wanting, or of an occasional filiform bract; involucel of several filiform bractlets 3-10 mm. long, usually exceeding the flowers but shorter than the fruit; rays 5-8, spreading-ascending, 2-7 cm. long; pedicels 2-3 mm. long; petals yellowish-green; fruit oval, rounded at apex and base, 5-6 mm. long, 4-5 mm. broad, the dorsal ribs prominent, the lateral wings narrower than the body; seed-face involute.
Type locality: Sierra de San Felipe, Oaxaca, Pringle 4663.
Distribution: High mountains, Vera Cruz to Oaxaca (Conzatli & Gonzalez 224, Galeolti 2782).