Arracacia donnell-smithii Coult. & Rose

Arracacia donnell-smithii Coult. & Rose, Bot Gaz. 5: 261. 1890.
Stout, caulescent, branching, 15-70 dm. high, densely puberulent in the foliage, inflorescence and juvenile parts, woody and glabrate below; leaves deltoid-ovate in general outline, excluding the petioles 2-3.5 dm. long, ternate-pinnate, the leaflets lanceolate, acuminate at the apex, distinct or the terminal confluent, sessile, 3-10 cm. long, 1-3 cm. broad, finely doubly serrate with mucronate teeth, and occasionally lobed toward the base, puberulent on the veins, and with a conspicuous puberulent ring at the apex of the petiole and each joint of the rachis; petioles 1-2 dm. long, sheathing at the base; cauline leaves with broadly inflated sheaths, the uppermost often bladeless; inflorescence branched, the peduncles 5-15 cm. long, puberulent; involucre wanting, or of a few scarious or foliaceous bracts; involucel of about 8 lanceolateacuminate, scariousand crisp-margined bractlets, 5-10 mm. long, exceeding the flowers but shorter than the fruit, glabrous or nearly so, reflexed in fruit; rays 9-16, stout, spreading, subequal, 3-6 cm. long, puberulent; pedicels short, stout, spreading-ascending, 2-3 mm. long, puberulent; flowers white or pinkish, the petals obovate; stylopodium conic, the styles long, recurved; carpophore 2-cleft to the base; fruit ovoid, abundant, 7-8 mm. long, 5-6 mm. broad, glabrous but roughened, tapering at the apex, the ribs prominent, obtuse; oil-tubes solitary in the intervals, 2-4 on the commissure; seed-face deeply sulcate.
Type locality: Top of Volcan de Agua, Depart. Zacatepequez, Guatemala. Smith 2196. Distribution: High mountains of Chiapas & Guatemala (Matuda 2336, Nelson 3630).