Arracacia tolucensis (Spreng.) Hemsl.

Arracacia tolucensis (H.B.K.) Hemsl. Biol. Centr
Bot. 1: 564. 1880.
Liguslicum lolucense H.B.K. Nov. Gen. & Sp. 5: 19. 1821.
Cnidium lolucense Spreng. Syst. 1: 888. 1825.
Vclaea toluccensis DC. Prodr. 4: 231. 1830.
Arracacia montana Coult. & Rose, Proc. Wash. Acad. I: 142. 1900.
Stout, caulescent, branching, about 1 m. high, the foliage more or less scaberulous and the inflorescence puberulent; leaves deltoid in general outline, excluding the petioles 2-3.5 dm. long, 3-4-ternate or 3-4-ternate-pinnate, the leaflets lanceolate, acute with a prominent callous point, cuneate at the base, distinct or the terminal confluent, 3-8 cm. long, 0.5-1.5 cm. broad, sharply and remotely serrate, the teeth callous-pointed, usually lobed toward the base, scaberulous on the veins and margins beneath, or glabrate; petioles 10-20 cm. long, sheathing at the base; cauline leaves like the basal, the uppermost usually opposite, greatly reduced and often simple, with obsolete sheaths; inflorescence with several verticils of slender peduncles 3-12 cm. long; involucre wanting; involucel wanting or of a few small bractlets; rays 6-12, slender, spreadingascending, subequal, 1.5-3 cm. long, slightly webbed at the base and often puberulent; pedicels short, spreading-ascending, 2-3 mm. long, webbed at the base and often puberulent; flowers greenish-yellow; stylopodium conic, the styles short, erect or spreading; carpophore 2-cleft to the base, lax; fruit ovoid-oblong, 6-8 mm. long, 3-4 mm. broad, glabrous, tapering at the apex, the ribs prominent, acute; oil-tubes large, solitary in the intervals, 2 on the commissure; seed channeled under the tubes, the face deeply sulcate.
Type locality: "Locis alpinis Novae Hispaniae. inter Tolucam et Ishlahuacam," Mexico, Humboldt tr Bonpland.
Distribution: Nuevo Leon and Coahuila, south to Jalisco and Mexico (state) (Rose 2884a, 3585).