156 UMBELLIFEE«. 



* * More slender, leaves much dissected; fl. yellow. 



i. P. utrieulatum, Nutt. Rather slender, usually erect and branch- 

 ing, 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, % i* 1 - ^ on S 

 or less : umbel 5 — 20 rayed, with involucels of dilated obovate often 

 toothed petiolulate bractlets: fr. glabrous, broadly elliptical, 2—5 lines 

 long; wings thin, as broad as the body; oil-tubes large and solitary in 

 the intervals, 4 — 6 on the face. — On plains and open hills. 



5. P. carnifolinm, Torr. & Gray. Herbage and general aspect of 

 the last, but acaulescent or nearly so; petioles without bladdery dilata- 

 tion; leaf -segments % — 2 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. — Plains and hills. 



* * * Leaves not finely dissected, fi. yellow. 



6. P. robustum, Jepson. Acaulescent, glabrous, glaucous, 2 ft. high: 

 leaves pinnately ternate; leaflets broadly ovate or oblong, sessile, sparingly 

 toothed or serrate at summit, otherwise entire: scapes 1 — 3, very stout, 

 greatly dilated under the rays, these 15—21, unequal, also dilated at 

 summit; involucre and involucels 0: fr. 2)4 — 3 lines wide, 4J^ — 5 lines 

 long, the wing half as broad as the body; oil- tubes solitary in the 

 intervals, 6 on the commissural face.— Plains of the Sacramento, in 

 Solano Co. May, June. 



7. P. Hassei, C. & E. Caulescent, stout, 1—2 ft. high, glabrous, 

 glaucescent: leaves biternate, in long petioles; leaflets broadly ovale, 

 with cuneate base, irregularly lobed, coarsely mucronate-toothed, 2—3 in. 

 long: umbel long-peduncled, 8 — 10-rayed, with involucre and involucels 

 of oblanceolate, or linear, or linear-setaceous bracts and bractlets: fr. 

 very large, glabrous, with very broad wings; oil- tubes solitary in the 

 intervals. — Vaca Mountains, Solano Co. 



8. P. sativum (L.), Wats. Biennial, branching, 2 — 4 ft. high: stem 

 leafy, angular or fluted; herbage nearly glabrous, of a somewhat yellowish 

 green: leaflets of the pinnate leaves large, ovate or oblong, incisely 

 toothed: involucre and involucels small or 0; fr. oval, 2 — 3 lines long, 

 broadly winged, prominently ribbed; oil- tubes solitary in the intervals. 

 — The Parsnip of farms and gardens, native of Europe; spontaneous 

 here and there by waysides and in waste lands. 



19. SPHONDYUUM, Town. (Cow Paesnip). Perennial or biennial, 

 with stout hollow fluted stem, ample lobed or compound leaves, and 

 very large umbels of white flowers. Calyx-teeth small or obsolete. 

 Fruit round-obovate, very much flattened dorsally, somewhat pubescent. 



