302 UMBELLIFERAE. 



to orbicular, ."> to :'>'•_■ lines long, the wings broader than the body; oil-tubes 

 solitary in the intervals, 2 to 1 on the face. 



Santa Cruz Mts.; Monterey; San Luis Obispo. May. 



3. P. hassei C. & R. Nearly acaulescent, 16 in. high, glabrous and 

 glaucous; leaves ternate and pinnate; leaflets roundish, cuspidately serrate, 

 frequently 3-lobed, i/> to iy 2 i n - broad; peduncles several; rays 11 to 18; 

 bractlets ovate or lanceolate, or mostly one and that laciniately cleft; fruit 

 6 to 8 lilies Long, nearly or quite as broad, very broadly winged, emarginate at 

 base and apex; oil-tubes 4 on the face, solitary in the intervals with occasionally 

 an additional one in one of the lateral intervals. 



Mt. Hood Range; Vaca Mts.; Southern California. 



4. P. macrocarpum Nutt. Short-caulescent, 10 to 14 or 16 in. high, the 

 stems several froma short scale-bearing caudex crowning an elongated tuberous 

 root ; herbage thinly short-pubescent; leaves in a basal or sub-basal tuft, 2 to 5 in. 

 long, <»i the earliest as much as 10 in. long, once or twice ternate and twice 

 pinnately divided, the segments linear, acute, % line broad or less and % to 

 2 lines long, the ultimate divisions of the rachis winged; fruiting rays about 

 equal, iy 2 to 4 in. long; pedicels 3 to 5 lines long; bracts none; involucel of 

 many lanceolate bractlets mostly exceeding the umbellets, sometimes united at 

 base and unilateral; flowers chalk-color; ovary and fruit glabrous; fruit 

 oblong to ovate, mostly narrow but sometimes very broad and somewhat quad- 

 rangular, 2 to 4 lines wide, 6 to 10 lines long; ribs inconspicuous or almost 

 obsolete; oil-tubes 1 to each interval, 2 to 6 on the face, the seed sharply 

 channeled beneath those of the dorsal intervals; wings broader, sometimes 

 narrower than body. 



Open stony hills in the Coast Ranges and Sierra Nevada. Not uncommon 

 with us but more abundant and widely distributed northward to the Columbia 

 River. 



5. P. dasycarpum T. & G. Nearly acaulescent, the peduncles several from 

 a stout taproot, erect or ascending, 6 to 15 in. high; herbage with a short 

 stiffish pubescence; leaves ternately decompound and dissected into small nar- 

 rowly linear segments; segments 1 or 2 lines long and less than */> line wide; 

 fertile rays 6 to 11, 1 to 2% in. long; pedicels in fruit 3 to 6 lines long; in- 

 volucels unilateral, composed of several ovate or lanceolate more or less united 

 bractlets; ovary tomentose or conspicuously woolly; fruit suborbicular, 4 or 

 .1 lines long and nearly or quite as broad; wings quite as broad or broader 

 than body; oil-tubes variable, 2 or 3 in the intervals or sometimes 1, 4 or 2 

 on the face. 



Open chaparral hills or open woods, or in the valleys of the Coast Ranges 

 and Sierra Nevada toot hills, common but rarely abundant in any one place. 

 No satisfactory differences between this species and P. tomentosum Benth. 

 have ye1 been formulated and perhaps do not exist. The number of oil-tubes is 

 very variable, the segmentation of the leaves equally so, while the tomentum 

 of the fruit is singularly inconstant. Apr.-May. 



<> P. vaseyi ('. ..V. R. Short caulescent, branching near the base. 1 ft. high; 



ternate-pinnate, the divisions pinnately cut into segments l to 2 lines 



long an. I y A to j ._. line broad; petioles broadly inflated, I to 5 lines long; rays 



.") to It, the fertile '._. to :'i s in. long; involucre none; pedicels 1 to 2 hues 



long; bractlets cuneate-obovate, abruptly acuminate; flowers yellow; fruit 

 elliptic or Blightly narrowed towards the base, I to 5% lines long, .". to 4 lines 

 wide; the bodj 2 to 2% lines long, contracted at base into a stipe like process 



