87 



parted below, then confluent, finally toothed above, the larger seg- 

 ments more or less laciniately toothed: umbel of numerous rays, 

 with involucels of elongated (half inch long) linear bractlets; rays 

 2 inches long; pedicels 5 or 6 lines long; fruit ( immature) with long 

 slender conical stylopodia as long as the styles, and prominent 

 winged ribs: oil-tubes 5 or (S in the intervals, to 8 on the com- 

 missural side: seed strongly flattened dorsally. 



Low grounds, near headwaters of Jocko Kiver, Montana, July Ki, lH8:i 

 {Canhu l'>o, distributed as L. »C()\ndorum, var. ?, with the herbarium note, 

 "perhaps a sp. nov.") 



The foliage of this species is very different from that of any other 

 LiaustUum, but the mature fruit is needed to complete the description. 



<>. L. filicinum Watson, Proc. Am. Acad. xi. 140. Stem 

 1]4 to 8 feet high, mere or less leafy, with glabrous inflorescence: 

 lower leaves often very large, once or twice ternate, then bipin- 

 nate;the narrow segments deeply pinnatifid to entire: umbel of 

 numerous rays, with involucels of one or fev; small linear bractlets; 

 rays (fruiting) 1 to 2 inches long; pedicels 3 to 5 lines long; fruit 

 narrowly oblong, 8 to 3^2 lines long, with somewhat prominent 

 conical stylopodia, and prominent somewhat winged ribs: oil- 

 tubes 3 to 5 in the intervals, (5 to 8 on the commissural side: seed 

 strongly flattened doryally, with angled back, and face slightly 

 concave, with no cer.tral ridge. 



S. Utah, in the Wahsateh and Uintah Mts. {WtiLson 454. Parry 82, 

 JoncM 1170, Tracy ()8(i, Hooker it- Gray), northward to Wyoming (Porr^/ 

 121). and Yellowstone Park {Tweedy 5). Fl. July. 



In Watsons Repoit on Kirig'sExped. this wasrtfenedto L. apiifolium; 

 and in Am. Nat. ix. 291, it was referred by Parry to L. f<copulortim. It 

 differs from both of these species chiefly in its more- dissected foliage, 

 larger more oblong fruit, more dorsally flattened carpels, and the absence 

 of any central ridge upon the seed-face. 



7. L. tenuifolium Watson, Proc. Am. Acad. xiv. 293. Stem 

 slender, 1 to 2 feet high, naked alxnc the base or with a single leaf, 

 bearing 1 to 3 glabrous umbels: leaves small, icrnate then pin- 

 nately decoinpound, fineU dissected with laciniateh' (li\ ided leaf- 

 lets, the ultimate segments linear and short: umbel few-rayed ((3 

 to 12), with involucels of 1 or 2 narrovvly linear bractlets; rays 

 about an inch long ; pedicels 2 to 3 lines long: fruit oblong, 1 1^ to 

 2 lines long, with narrow ribs: oi'.-tubes 3 to 5 in the intervals, 6 

 to 8 on the commissural side. 



