435 



very large stipules resembling those of P. Plattensis and a large 

 calyx which is strongly hirsute. From P. Plattensis and the other 

 species of the group it differs in the stoutness of the plant, which 

 is 3-6 dm. high and by the fewer (2-5 pairs) and larger leaflets, 

 which are from 3-6 cm. long, and the acute teeth. It is a rare 

 species. The only specimens seen are the following: 



Washington : W. N. Suksdorf, no. 539. 1875. 



Oregon: Elihu Hall, no. 135. 1871. 



California: J. G. Lemmon, no. 1200. 1875. 



British Colninbia: John Macoun, no. 32. 1890. 



Rocky Mountains of British America : E. Bourgeau, 1858. 



