08 



Hovvcrs yellow: fiiiit hroutlh- elliptical, glabicnis, 2 to o lines lon<^, 



1 to 8 J/2 li'ii-'^ broad: oil-tubes 4 to 6 on the commissural side, 

 sometimes 2 or 8 very short accessory ones in the dorsal intervals: 

 seed-face somewhat concave. (Fig. (50.) 



From S. California to Briti'^h Columbia, and oxtending eastward to 

 Idaho. Fl. April to July. 



* * Fniit-xvings narroxv a/id ihickish : oil-tubes obsolete or 

 very indistinct and numerous in the intervals: dorsal and inter- 

 mediate ribs obsolete or nearly so. 



21). P. caruifolium Torr. & Gray, Fl. i . 628. Like the preced- 

 ing species, but often more caulescent, the elongated peduncles i^ 

 to li/^ feet high, leaf-segments % to 2 inches long, dilated bractlets 

 not only obovate but often lanceolate, fruit 3 or 4 lines long, with 

 wings half as broad as body and obsolete dorsal and intermediate 

 ribs, oil-tubes indistinct, 2 or 8 in the inteivals, none on the com- 

 missural side. (Fig. (U.) — P. marginatum Benth. PI. Hartw. 312. 



Central California, from San Luis Obispo county {Joues 3600), 

 through the central counties by numerous colle.'tors, to Butte county 

 {Mrft. R M. Ausfin). 



80. P. bicolor Watson, King's Rep. v. 129. Caulescent or 

 scarcely so, 4 to 18 inches high, glabrous or slightly puberulent: 

 petioles wholly dilated; leaves ternate-pinnately decompound, tlie 

 ultimate segments very numerous and linear: umbel very unequall}' 



2 to 10-rayed, with involucels of 1 to 8 linear-subulate bractlets; 

 rays 1 to 5 inches long; pedicels short; flowers yellow or white: 

 calyx-teeth obsolete: fruit oblong, glabrous, 5 to 6 hues long, 1 to 

 2i^ lines broad, with nenrly obsolete dorsal and intermediate ribs: 

 dorsal oil-tubes obsolete, 2 on the commissural side. 



Utah, Wahsatch Mts. (irn/«o«. Pa rrj/ 21), City Creelv Canon iJoneH 

 1713, in 1880); Nevada, Empire City {Jonen, in 1882); Oregon, Hood River 

 [HenderHon). 



This species resembles Leptotivnia in the thicliness of its wings. 



81. P. Parishii C. & R. Bot. Gazette, xiii. 209. Caules- 

 cent, from a few inches to a foot high, glaucous, closely pubescent, 

 from a thick elongated root: leaves pinnate, with pinnatifid to 

 entire leaflets, the ultimate oblong-linear or linear segments cuspi- 

 date, somewhat toothed or entire; root-leaves sometimes nearly- 

 entire or few-cleft: umbel unequally 4 to 12-rayed, with involucels 

 of small linear-lanceolate acuminate bractlets; rays 1 to 5 inches 



