Contributions to Western Botany. 31 



pinnately and not ternately decompound, fruit round, thicker 

 and smaller, and commissural oil tubes large and near the mar- 

 gin, while the other has delicate sinuous oil tubes near the 

 center and with i to 2 threadlike ones in each wing near its 

 base; both have similar flowers, habit, concave wings, pubes- 

 cence, ultimate segments and approximate ribs. This differs 

 from P. Mohavense Rose & Coulter in the few oil tubes on the 

 commissure, smaller fruit, and not raised ribs. Leaf characters 

 in P. Mohavense are not given in description. P. villosum was 

 also collected in this region, but its habit is wholly different. At 

 Darwin P. Argense grows on gravelly clay knolls and is the first 

 flower out. 



Peucedanum scopulorum n. sp. Acaulescent, densely 

 tufted, glabrous, strong smelling, rigid; peduncles erect, stout, a 

 foot high; leaves with many dead petioles at base, sheaths 

 scarcely any; petioles and rachis of leaf round, tapering, nearly 

 as long as peduncles; general outline of leaf narrow, blade 6 to 

 8 lines long, bipinnate with lowest pair of pinnules on each pinna 

 again divided and enlarged as though ternate, final segments 

 linear-oblong, 2 lines long, pungent, a little revolute, pinnae dis- 

 tant sessile, 6 to 9 lines long, with about 4 pairs of pinnules; 

 rays about 10, equal, l}£ inches long, rather slender; involucels 

 unilateral, of several linear to subulate, often incised, green 

 bracts, not hyaline, somewhat united below, 4 lines long; pedi- 

 cels slender, 6 to 8 lines long; fruit not mature, 3 lines long, 

 oval-ovate, flat, lateral wings }4 the body, ribs not raised, oil 

 tubes apparently 2 in the intervals; stylopodium depressed; 

 flowers appear yellow. This has the habit of Cymopterus anis- 

 atus, but the fruit of a Peucedanum. Pleasant Canyon, Pana- 

 mint Mts., Inyo Co., Cal , among rocks, at 5500 ft. alt. May 6, 



1897- 



Cymopterus lapidosus. Pcncedanum lapidosum Jones 

 Cont. i 246 (Zoe ii). This was described as having solitary oil 

 tubes in the intervals. Recent collections show very similar 

 material which cannot be separated from it which has 4 to 6 

 iaint oil tubes in the intervals, while there are traces of them in 



