Arracacia longipedunculata J. M. Coult. & Rose

Arracacia longipedunculata Coult. & Rose, Proc. Wash Acad. 1: 142. 1900.
Slender, caulescent, simple below the inflorescence, from a tuberous or fusiform root, 5-9 dm. high, glabrous or the foliage scaberulous; leaves deltoid in general outline, excluding the petioles 1-1.5 dm. long, 2-3-ternate, the leaflets ovate to ovate-lanceolate, acute, cuneate at the base, distinct and petiolulate or the terminal confluent and sessile, the terminal much the longest, 1 .5-6 cm. long, 1-2.5 cm. broad, coarsely serrate to somewhat lobed, scaberulous on the veins and margins; petioles slender, 8-17 cm. long, sheathing at the base; lower cauline leaves like the basal, the upper ternate, sessile, the sheaths linear and inconspicuous, the terminal lobes elongate, linear-oblong to lanceolate, 25-65 mm. long; inflorescence with 1-4 umbels on usually verticillate, slender peduncles, 5-10 cm. long; involucre wanting, or of a single linear bract; involucel of several filiform bractlets about 5 mm. long, about equaling the flowers but shorter than the fruit; fertile rays 3-5, slender, spreading-ascending, unequal, 3.5-6 cm. long; fertile pedicels 2-4, slender, spreading-ascending, 4-8 mm. long; flowers white, the petals obovate; stylopodium low-conic but evident, the styles very short, spreading; carpophore 2-cleft to the base, flattened; fruit ovoid, 4—5 mm. long, 3 mm. broad, glabrous and slightly glaucous, rounded at the base, the ribs filiform and indistinct; oil-tubes small, about 3 in the intervals and on the commissure; seed-face deeply sulcate.
Type locality: "In canyons above Cuernavaca," Morelos. Pringle 6333. Distribution: Mexico (state) and Morelos (Hinton 2121, 7939).

Arracacia longipedunculata là một loài thực vật có hoa trong họ Hoa tán. Loài này được J.M.Coult. & Rose mô tả khoa học đầu tiên năm 1900.