120 UMBELLIFER^E. (PARSLEY FAMILY.) 



* Leaves not finely dissected (rarely bipinnate), the segments large or broad or 



elongated : flowers yellow : fruit glabrous. 



-t Acaulescent, glabrous : fruit oblong : leaves pinnate or bipinnate ; leaflets 

 narrowly linear. 



1. P. graveolens, Watson. Scape 6 to 18 inches high, a little exceed- 

 ing the leaves : fruit 4 or 5 lines long, narrowly margined : oil-tubes about 



2 in the intervals, 4 on the commissure. Bot. King's Exp. 128. Mountains 

 of Utah and Colorado, subalpine. 



*- - Caulescent : oil-tubes solitary : leaflets linear, entire. 



2. P. simplex, Nutt. Finely puberulent, often tall : leaves ternate or 

 biternate: fruit orbicular, 3 to 6 lines long, .emarginate at each end; wings 

 broader than the body ; ribs prominent. From S. W. Montana to N. 

 Arizona. 



3. P. ambiguum, Nutt. Glabrous, often low : leaves 1 to 2-pinnate with 

 long leaflets, the upper often more dissected : fruit narrowly oblong, 4 lines long, 

 narrowly winged ; oil-tubes 2 on the commissure. Torr. & Gray, Fl. i. 

 626. W. Montana to Oregon and Washington. Root much used by the 

 Indians. 



* * Leaves ample, very finely dissected ivith short filiform segments : flowers 



yellow : fruit glabrous. 

 t- Acaulescent, usually tomentose: fruit orbicular or broadly elliptical. 



4. P. fOBnicillaceum, Nutt. Sometimes even glabrous : involucels 

 gamophyllous, 5 to 7-cleft : fruit 2 or 3 lines in diameter; ribs prominent; 

 oil-tubes 1 to 3 in the intervals, 2 to 4 on the commissure. Loc. cit. 627. 

 From the Saskatchewan to Nebraska and the Indian Territory. 



-i- H- Caulescent, glabrous: fruit oblong. 



5. P. bicolor, Watson. Stem short : peduncle elongated : rays few, 

 very unequal : involucel of a few linear bractlets : fruit narrowing from near 

 the base, narrowly winged; ribs filiform; oil-tubes obscure. Bot. King's 

 Exp. 129. Wahsatch Mountains. 



* * * Leaves smaller, much or finely dissected icith small segments: flowers 



yellow : fruit pubescent : low, acaulescent. 



6. P. villosum, Nutt. More or less densely pubescent : leaves of very 

 numerous crowded narrow segments : umbels dense in flower : fruit oval, 



3 or 4 lines long; oil-tubes several in the intervals. From Nebraska to W. 

 Nevada and S. Utah. 



* * * # Leaves much dissected with small segments : flowers white : fruit 

 glabrous: usually low, somewhat caulescent or scarcely so. 



7. P. macrocarpum, Nutt. More or less pubescent : involucels conspicu- 

 ous: fruit 4 to 10 lines long, 2 or 3 wide; calyx-teeth evident; ribs filiform; oil- 

 tubes rarely 2 or 3 in the intervals, 2 to 4 on the commissure. Torr. & 

 Gray, Fl. i. 627. From the Saskatchewan to Washington Territory and 

 N. California. 



8. P. nudicaule, Nutt. Nearly glabrous : involucels small : fruit ellip- 

 tical, 2 or 3 lines long; calyx-teeth obsolete; ribs prominent; oil-tubes always 

 solitarv, 2 to 4 on the commissure. Loc. cit. Nebraska and N. Colorado. 



