330 UMBELLIFER.E. 



solitary in the dorsal intervals, 2 in the lateral, 4 on the face: seed con- 

 cave on the face, with a central ridge. —Plumas Co., Mrs. Austin, and 

 northward. 



5. P. Vaseyi, C. & R 1. c. 144 (1888). Subacanlescent, 6 -8 in. high, 

 pubescent: leaves small (1—2 in. long); petioles inflated; blade bipin- 

 nate, the small ovate segments irregularly 3— 5-lobed: umbel with 2—5 

 equal rays ; involucels of obovate petiolulate toothed bractlets : fl. 

 perhaps yellowish: fr. broadly oblong, 1.3 in. long, emarginate, glabrous; 

 wings twice as broad as the body; ribs prominent; oil-tubes solitary in 

 the intervals, 4 on the face. —Among the foothills east of Sacramento 

 and southward. 



* * More slender, leaves much dissected; fl. yellow (except in n. 8). 



6. P. utriciilatum, Nutt.; T. & G. Fl. i. 62S (1840). Rather slender, 

 usually erect and branching, 1 ft. high or more, glabrous or puberulent: 

 petioles short, their margins greatly dilated and forming a membranous 

 saccate cavity; ultimate segments of the decompound leaves narrowly 

 linear, 1^ in. long or less: umbel 5 — 20-rayed, with involucels of dilated 

 obovate often toothed petiolulate bractlets : f r. glabrous, broadly ellipti- 

 cal, 2 — .5 lines long; wings thin, as broad as the body; oil-tubes large 

 and solitary in the intervals (or sometimes with 1 or 2 short accessory 

 ones), 4 — 6 on the face; seed somewhat concave on the face. — Common 

 throughout the State, at least in the western portion, and on plains of 

 the interior. 



7. P. caruifolium, T. & G. Fl. i. 628 (1840). Herbage and general 

 aspect of the last, but acaulescent or nearly so; petioles without bladdery 

 dilatation; leaf -segments ^i—l in. long; bractlets of involucels often 

 lanceolate: fr. 3— 4 lines long: wings narrow and thickish ; ribs obsolete : 

 oil-tubes indistinct, 2 or 3 in the intervals, none on the face. — Common in 

 central parts of the State. 



8. P. Parishii, C. & R. Bot. Gaz. xiii. 209 (1888). Caulescent, 4 12 

 in. high, pallid and pubescent: leaves pinnate, with pinnatifid or entire 

 leaflets, the ultimate segments oblong-linear or linear, cuspidate, toothed 

 or entire: umbel unequally 4 12-rayed, with involucels of small linear- 

 lanceolate acuminate bractlets; rays 1—5 in. long; pedicels 2—4 lines: 

 fl. white: fr. obovoid, 4—6 lines long, glabrous, broadly or narrowly 

 winged; ribs filiform or obsolete; oil-tubes small, often obscure, 6—8 in 

 the intervals, 8 to 10 on the face. From Colusa Co., southward to San 

 Bernardino. 



* * * Leaves not finely dissected, the leaflets with liroad or elongated 

 segments; fl. yellow. 



9. P. triteruatuin, Nutt.; T. & G. Fl. i. 626 (1840); Pursh, Fl. i. 197 



