71 



California, Folsoiu i .U. K. Ciirntn), Mixloc county (Mrs. h'. M.Au.Hlhn; 

 Oroyon (Ciisirk lOilS). 



This form most cvi'lontly intergrades between /'. Irilenmlum and P. 

 simfilcv. Iiavingthc fniit outline of the former and the broad wings of the 

 hitter. As it merges into true P. IrUenmluin, however, by insensible 

 gradations, and is (|uite distinct in fruit outline from P..siinple.r, we include 

 it as a viuity of the former. 



3o. P. laevigatum Null. Ton. A: (Jra), Fl. i. t]"i7. Closely 

 rcseiiihling the preceding species, but completely glabrous, a foot 

 or so high, with triternate leaves and much reduced leaflets or 

 segments, the latter but 8 to D lines long, and half a line wide; pedi- 

 cels 4 to 5 lines long; fruit 4 to T) lines long, 1 ]/i to 2 lines broad, 

 with wings as broad as body. ( Fig. (')<).) 



Along bluffs of the Columbia Iliver in Oregon ( IfcnilciNoin and Wasli- 

 ington Teiritory (Hoirfll, Suksdorf). 



3<). P. Kingii Watson, Proc. Am. Acad. xxii. 474. Acau- 

 lescent, glabrous: scape () to 18 inches high, a little exceeding the 

 leaves: leaves pinnate or bipinnate; leaflets linear, elongated, cuspi- 

 date, sometimes 2 inches long: umbel somewhat ecpially 4 to 20- 

 rayed, with involucels of linear-lanceolate l)ractlets; ia\s 1 14 inches 

 long; pedicels 1 to 3 lines long: calyx-teeth exident: fruit oblong, 

 4 to r> lines long, 2 lines broad, narrowly winged, the dorsal and 

 intciiiK-diate ribs also sonu'tinirs irrcgularh winged: oil-lubes '.', Ik 

 •"• in thv inlerxals, ti t<> iO <<\\ the commissural side-: seed sdux'W bal 

 suleate on the back, wilh slii^htly concave f:ice. ( J-'ig. <»'i.) Srs,// 

 Nuttallii Gray, Proc. \\w. Acad. viii. 287, in part. Miiscuiuin 

 tcnuifoliuin Hook,, not Xutt. /'. gravcolcii.s Watson, King's 

 Rep. V. 128. 



Mountains of Utah and Colorado. Fl July and August. 



Var. alpina. Dwarf, with stems 4 to inches l.igh, lea\ es 3 

 inches long, niosth- simplv jiinnale, with 3 to -") jiairs of leaflets : 

 umbel 3 to 6-rayed : fruit linear-o])long, 2 to 3 lines long: oil- 

 tubes very obscure, 1 or 2 in the intervals, 4 to (> on the commis- 

 sural side. — P. i^ravcolois^ \ar, a/pii////// Watson, King's Rep. 

 V. 12<.). 



East Humboldt Mountains, Xevala, !i,0(h» feet altitu<le ( Witts,, h U\U. 



* * Leaves ~cit/i lanceolate to orbicular segments. 



37. P. leiocarpum Xutt. Ton. t\: (Jray, Fl. i. ()2(). Acaules- 

 cent, glabrous, 1 to 2 feet high, from a \ery long fleshy it)ot : 



