30 Contribution* to Western Botany. 



linear to lanceolate, acute, i to 2 lines long; leaves about 3 

 inches long; whole plant ashy-puberulent and slender; flowers 

 yellow; rays about 20, but fertile ones about 6, unequal, 1 to 2 

 inches long, the sterile very short; involucres absent, but rarely 

 a single simple or leaf-like bract occurs: involucels of several, 

 filiform-subulate, not hyaline bracts; fruiting pedicels 3 to 5 

 lines long; fruit 3 to 4 lines long, 2 lines wide, elliptical, wing a 

 little narrower than the body, all the ribs evident, not raised, 

 oil tubes 2 in the intervals except the marginal ones where they 

 are 3, 4 on the commissure and with a delicate one on the inner 

 edge of the wing, inner face flat. 



Coalville, Utah, May, 14, 1889, among junipers; also at 

 Carter, S. W. Wyo., June 25, 1896. 



Peucedanum Argense. n. sp. Acaulescent, densely 

 tufted crown thick with 2 inch-long, coarse fibers, the remains of 

 many root sheaths; peduncles a foot or less long, stout, subde- 

 cumbent, 1 to 4 lines thick; whole plant hoary with short 

 pubescence; leaves long-petioled, scarcely enlarged below and 

 with no enlarged bases appearing above the fibers, tripinnate to 

 almost quadripinnate, final segments about a line long, oblong 

 to obovate, apiculate, thick, leaves nearly as long as peduncles; 

 involucres none; rays stout, 1 to 1^ inches long, many, nearly 

 equal; pedicels about a line long; involucels linear to lanceolate- 

 subulate, about 2 lines long; fruit nearly round to oblate, trun- 

 cate to emarginate below, 2^ lines long, thick wing about %. 

 the body, concave on the inner face, sparsely puberulent, dorsal 

 ribs filform, not prominent, approximate, oil tubes 3 in the in- 

 tervals, 4 on the commissure, rather large, placed near the mar- 

 gin, both faces of seed from flat to a little convex; flowers white, 

 yellow or purple. 



Lone Pine, Inyo Co., Cal., May 14, 1897, 7000 ft. alt. among 

 rocks, in fruit; also in fruit at Darwin Mesa, Inyo Co. Cal., May 

 8, 1897, at 5000 ft. alt.; also at Darwin, Cal., April, 28, 1897, 

 4600 ft. alt. in flower. 



This differs from P. villosum Nutt. in being much more 

 robust, with nearly equal rays, no enlarged leaf-sheaths, leaves 



