Coulterophytum laxum Robins.

Coulterophytum laxum B. L. Robinson, Proc. Am Acad. 27: 169. 1892. Plants 15-30 dm. high, woody and about 2.5 cm. thick at the base, glabrous; leaves ovatedeltoid in general oudine, excluding the petioles 2.5-4 dm. long, 2.5-4.5 dm. broad, 2-3-pinnate, the leaflets ovate to ovate-lanceolate, 4—10 cm. long, 1.5-4.5 cm. broad, acute to acuminate at the apex, narrowed, rounded, or oblique at the base, serrate-apiculate, hirtellous on the veins; petioles scarious-winged, 3-8 cm. long; peduncles 1.5-6 cm. long; involucre wanting, or of 1-several short filiform bracts, shorter than the rays; involucel of several filiform, scariousmargined, hirtellous bractlets, shorter than the fertile flowers; rays 12-20, spreading to rarely reflexed, subequal, 15-30 mm. long, hirtellous; fertile pedicels 2-8, 3-5 mm. long, usually glabrous; ovary somewhat hirtellous; carpophore 2-parted; fruit clavate, 8-12 mm. long, 2-3 mm. broad, glabrous, the contracted base 3-5 mm. long.
Type locality: "Bluffs of barranca near Guadalajara," Jalisco, Pringle 3831. Distribution: Jalisco (Pringle 9810).