270 UMBELLIFER.E. Peucedanum. 



similar but distinctly ribbed ; the broad oil-tubes solitary in the intervals, 4 to 6 on 

 the commissure. — Torr. & Gray, Fl. i. 628. 



From Washington Territory and Idaho to Southern California, frequent ; Los Angeles (Fdch) ; 

 Ojai, Goodale. 



§ 3. Leaves very finely dissected vAih neirrow segments : flowers yellow: accmlescent, 



pubescent. 



7. P. villosum, Xutt. More or less densely pubescent, 3 to 6 inches high : 

 leaves Avith very numerous somewhat crowded small narrow segments : flowering 

 umbels dense ; involucels of several small linear bractlets : fruit oval, pubescent ; 

 oil-tubes probably several in the intervals. — Watson, Bot. King Exp. 131. 



The mature fruit is not known. The range appears to be from the base of the Sierra Nevada in 

 Western Nevada to Northern Arizona and eastward to Nebraska and S. Utah. The species neaily 

 resemhles P. fceniculaccinn, Nutt., of the eastern plains, which is taller, with ample leaves and 

 nearly filiform segments, the frait smooth, with prominent ribs and 1 to 3 oil-tubes in the intervals. 



Another species, allied to P. fondculaccuin, ranging from N. Utah to Idaho and possibly to 

 N. E. California, is P. iMILLEfolium, Watson. This is glabrous throughout, with ample finely 

 dissected leaves, large broadly winged glabrous fruit, and solitary oil-tubes. 



§ 4. Leaves much dissected uith small segments : flowei's wliite ; calyx-teeth j^rese at : 

 somewhat caulescent or nearly acaulescent, ^mbescent. 



% Fruit glabroiis, oblong or broadly elliptical. 



8. P. macrocarpum, Nutt. More or less pubescent : stems usually tufted, i 

 to 1 foot liigli : fertile rays nearly equal, an inch or two long ; involucels conspic- 

 tious, of several somewhat foliaceous lanceolate or linear bracts, often united and 

 unilateral: fruit oblong, 4 to 10 lines long, 2 or 3 lines wide, exceeding the pedi- 

 cels ; ribs filiform ; Avings half as wide as the seed ; oil-tubes solitary or rarely 2 or 

 3 in tlie intervals, 2 to 4 on the commissure. — Torr. & Gray, Fl. 1.627 ; Watson, 

 Bot. King Exp. 130. 



Var. eurycarpum, Gray. Fruit 4 or 5 lines wide, but slightly narrower at the 

 ends, the wings Ijroader than the seed : leaves usually rather more coarsely divided. 

 — Proc. Am. Acad. viii. 385. P. nudicaule, var. (?) elUpticnm, Torr. & Grav, 

 Pacif. E. Eep. ii. 121. 



Frequent from Washington Territory to the Saskatchewan, southward to N. California and N. 

 Nevada. The variety is api)arently the more prevalent fonn in California, ranging from Oregon 

 to the Sacramento, and scarcely occurring east of the Sierra Nevada. 



-,': -vr Fruit tomentose or 2yuberulent, oval-orbicular. 



9. P. dasycarpum, Torr. & Gray. More or less densely villous-tomentose, 

 ^ to 1 foot high : leaves finely dissected with narrow or filiform segments : fertile 

 rays nearly equal, an inch or two long ; involucels of several linear to lanceolate or 

 oval bractlets, free or united at base : fruit orbicular or ovate, often acutish above, 

 tomentose, 4 to 7 lines long, 3 to 5 broad ; ril^s prominent ; oil-tubes usually 3 

 (rarely solitary) in the intervals, 4 on the commissure. — Fl. i. C28. P. tomentosum, 

 Benth. PL Hartw. 312. 



Central California, from Mendocino and Placer counties to San Luis Obispo, on dry hillsides. 

 10. P. Nevadense, "Watson. Glaucous, puberulent : leaves less compoundly 

 dissected, the segments coarser : rays often unequal, 1 or 2 inches long ; involucels 

 smaller, of several lineardanceolate bractlets, usually distinct : fruit somewhat pubes- 

 cent, nearly orbicular to ovate, 3 to 5 lines long, 2 to 4 wide ; ribs prominent ; 

 calyx-teeth obsolete ; oil-tubes 2 or 3 in the intervals, or 4 in the lateral ones (per- 

 haps very rarely solitary), 4 to 6 on the commissure. — Proc. Am. Acad, xi, 143. 

 P. nudicaule, Watson, Bot. King Exp. 130, and others, not Nuttall. 



On the eastern side of the Sien-a Nevada frnni Northeastern California, to Sonora and New 

 Mexico. This much resembles P. xudicaule, Nutt., to which it has been ordinarily referred, a 

 more northern and eastern species, ranging from Nebraska and Northern Colorado to Idaho. 



