Arracacia ovata Coult. & Rose.

Arracacia ovata Coult. & Rose, Contr. U. S. Nat Herb. 3:296. 1895.
Stout, caulescent, branching, 1-2 m. high, the foliage and inflorescence more or less puberulent; leaves deltoid in general outline, excluding the petioles 1.5-2 dm. long, 2-ternate, the leaflets broadly ovate, acute at the apex, rounded or cordate at the base, distinct, longpetiolulate and remote, 5-8 cm. long, 3-5 cm. broad, finely serrate and often with a single lobe at the base, puberulent on the veins beneath; petioles 20-25 cm. long, broadly sheathing at the base; cauline leaves greatly reduced upwards, with dilated sheaths; inflorescence branched, the peduncles stout, 6-15 cm. long, the umbels all about equal in size and fertility; involucre wanting; involucel of several linear bractlets, 2-3 mm. long; rays 15-20, spreading-ascending, subequal, 3-5 cm. long, webbed at the base, puberulent; pedicels short, spreading-ascending, 2-5 mm. long, webbed at the base, puberulent; flowers not seen; stylopodium conic, the styles long, erect or spreading; carpophore 2-cleft to the base, rigid, the two halves filiform; fruit lanceolate, 6-8 mm. long, 3-4 mm. broad, glabrous, the ribs prominent, acute; oiltubes large, solitary or with 2 small accessories in the intervals, 4 on the commissure; seed channeled under the larger tubes, the face deeply sulcate.
Type locality: "On rocks near the top of the Sierra Madre near Chilpancingo," Guerrero, Nelson 2223.
Distribution: Known only from the type locality.