120 UMBELLIFER^. (PARSLEY FAMILY.) 



* Leaves not Jinebj dissected (rarely hipinnate), the segments large or broad (yr 



elongated : flowers yellow : fruit glabrous. 



•4- 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 ; wi}igs 

 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 ivith 

 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 with short filiform segments : fioivers 



yellow : fruit glabrous. 

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



4. P. fOBnieulaeeum, Xutt. 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. 



-t- -t- 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. Wasatch Mountains. 



* * * Leaves smaller, much or finely dissected ivith 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 ivith 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 and N. Cali- 

 fornia. 



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

 tical, 2 or 3 lines long ; cah/x-teeth obsolete; 7'ibs prominent; oil-tubes always 

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



