Conioselinum mexicanum Coult. & Rose

Conioselinum mexicanum Coult. & Rose, Proc Wash. Acad. 1: 147. 1900.
Slender, simple or sparingly branched, 3-9 dm. high; leaves ovate in general outline, excluding the petioles 6-14 cm. long, 3-10 cm. broad, 1-2-pinnate or 1-2-ternate-pinnate, the leaflets ovate to ovate-lanceolate, 10-25 mm. long, 10-15 mm. broad, coarsely pinnatifid and toothed, the lobes and teeth obtuse or acute; petioles 5-15 cm. long; cauline leaves with narrow sheaths and linear-oblong, elongate divisions; peduncles 7-17 cm. long; involucre wanting; involucel of 1-several filiform bractlets, 2-5 mm. long, or wanting; rays 5-11, subequal, 15-35 mm. long; pedicels 5-8 mm. long; fruit oval, 3 mm. long, 2 mm. broad, the dorsal ribs acute, unwinged, the laterals corky-winged; seed much flattened dorsally in cross section, the face plane to slightly concave.
Type locawty: "Sierra Madre, 65 miles east of Batopilas, Chihuahua," Goldman 191. Distribution: Arizona to Chihuahua (Gentry 1942, Kearney 6" Peebles 10,497).