Arracacia anomala (Coult. & Rose) Mathias & Constance

Arracacia anomala Math. & Const. Bull. Torrey Club 68: 121. 1941.
Museniopsis pubescens Coult. & Rose, Proc. Wash. Acad. 1: 134. 1900. Not Arracacia pubescens
H. Wolff. 1910. Tauschia pubescens F. Macbr. Contr. Gray Herb. 56: 33. 1918.
Slender, caulescent, branching from a woody root, 6-10 dm. high, densely short-pubescent throughout; leaves deltoid in general outline, excluding the petioles 5-10 cm. long, 2-3-ternate, the leaflets ovate, acute and mucronate at the apex, cuneate at the base, petiolulate, 2-3.5 cm. long, 1-2 cm. broad, pinnately parted or toothed, densely pubescent on both surfaces; petioles slender, 6-10 cm. long, narrowly scarious-sheathing at the base; cauline leaves numerous but greatly reduced, sessile with very narrow sheaths, ternate, the divisions linear and elongate; inflorescence copiously branched, the peduncles alternate, slender, 8-12 cm. long, pubescent; involucre wanting; involucel of several filiform, entire, pubescent bractlets, 5-8 mm. long, exceeding the flowers but shorter than the fruit; fertile rays 3-8, slender, spreading-ascending, 2-3 cm. long, pubescent; fertile pedicels few, slender, spreading-ascending, 4-8 mm. long, pubescent; flowers white, the petals obovate, pubescent on the back; stylopodium depressed and indistinct, the styles slender, recurved; carpophore not seen; immature fruit oblong-oval, 4-5 mm. long, 2-3 mm. broad, densely and uniformly short-pubescent, scarcely tapering at the apex, the ribs apparently filiform.
Typb locality: "In the Sierra Madre," Chihuahua, Nelson 6087. Distribution: Chihuahua (LeSueur 1397).