J889. J BOTANICAL GAZETTE. 277 



Yosemite Valley, California ( Torrey 



J 



Peucedan 



Drs. Torrey & Gray in immature condition. In 1883 it wa 



M 



dition that its generic relationship is evident. It is most 

 nearly related to P. Orcganum and P. Parryi in habit and 

 structure, but is very distinct in fruit characters, having nar- 

 rower and longer fruit, unusually narrow wings, and soli- 

 tary oil-tubes. 



Peucedanum evittatum. Acaulescent. 8 to 18 in. high, from 



a deep-seated small tuber, glabrous : leaves once or twice 

 ternate then more or less pinnate into linear callous-tipped 

 segments (£ to 2 in. long) : umbel somewhat unequally 8 to 

 18-rayed, with no involucre, and involucels of numerous pur- 

 plish lanceolate acuminate gamophyllous bractlets ; rays 1 to 

 2 in. long; pedicels short (1 to \\ lines): flowers white: 

 fruit oblong, glabrous, 4 to 5 lines long, i\ lines broad, with 

 very thin membranous wings more than half as broad as 



bodv, and no oil-tubes. 



Ellensburg, Spokane county, Washington, May. 1889 



(G. R, Vasey). 



In the absence of oil-tubes this species is entirely differ- 

 ent from all our known species of Peucedanum excepting P. 

 bicolor; and it notably differs from that species in its broad 

 thin fruit-wings and prominent gamophyllous involucels. It 

 would properly come in the tuberous-rooted section of our 

 Revision, probably nearest to P. Canhyi, but it contradicts 

 the section characters, as there drawn up, in its broad fruit- 

 wings and absence of oil tubes. Its affinities seem also to be 

 very, close with P. bicolor, which sp cies 

 in habit. 



Peucedanum Lemmoni. Caulescent, with most of the leaves 



near the base, 12 to 15 in. high, clothed at base with old leat- 

 sheaths, from an elongated rather slender root, glabrous: 

 leaves broad triangular in outline (5 to H in. long including 

 petiole), twice or thrice pinnate (or so broad as to appear at 

 first ternate), the ultimate segments linear ( 1 to 1 in. long) ; 

 uppermost leaves much smaller and simply pinnate : umbel 

 6 to 8-raved, with no involucre, and involucels ot a tew al- 

 most filiform bractlets: rays short (3 to 7 lines long,, mak- 

 ing tin- fruits appear in a head-like cluster; pedicels a line 

 long : flowers white (?) : fruit oblong, glabrous. 2 lines long 

 scarcely 2 lines broad, with thickish wings about half as 



it most resemble- 



