January 3, 1910 *6l 



Figure 6 represents the typically developed plant with long 

 lower petioles and elliptical leaflets, upper leaves with short pet- 

 ioles and linear-lanceolate leaflets. The plant also shows the 

 slender roots and rootstocks, and the long tap root which is usu- 

 ally broken or cut off in herbarium specimens. This plant was 

 growing among rocks on a bank at the edge of the meadow in 

 good soil, protected from grazing, and with plenty of room and 

 good drainage. 



The distribution of the species, so far as we have been able 

 to trace it, would seem to be from Washington, Oregon and 

 Idaho to northern California, thence down the Coast Range to 

 the northern part of Lake county, passing through California by 

 the Sierra Nevada ranges only, and extending along the moun- 

 tains in western Nevada. Some specimens not T. Rusbyi or T. 

 atronibens would indicate that it also occurs in the San Bernar- 

 dino mountains in southern California. 



The plants referred to in Synopsis of the Flora of Colorado, 

 by Porter and Coulter, page 20, under T. longipes are undoubt- 

 edly T. Rydbcrgii. 



An examination of the type collection of T. Rusbyi show's 

 that previous writers are mistaken in extending its range to the 

 Sierra Nevada mountains in California and Nevada. Typical 

 T. Rusbyi from Arizona is quite distinct from the others, espe- 

 cially in regard to the reflexed flowers. 



Nevada Agricultural Experiment Station. 



