R. W. Chaney — Flora of Payette Formation. 215 



1. 12 miles west of "Weiser, Idaho on the hills north 

 of the Snake river. 



2. Ballantyne ranch, % of a mile southeast of the 

 ranch house in a group of white hills. The ranch is 13 

 miles southwest of Homedale, Idaho, and this portion of 

 it is in Malheur Co., Oregon. 



3. Ballantyne ranch, along the ridge running north- 

 west of the ranch house. 



4. Sucker creek, 5 miles southwest of The Rocks, 

 Idaho, on the hills south of the valley, near the Idaho- 

 Oregon line. 



5. Sucker creek, 4% miles southwest of The Rocks, 

 and on the north side of the valley. 



6. Cartright ranch on Shafer creek, 7 miles south of 

 Horseshoe Bend, Idaho, in a gulch about y 2 mile south- 

 west of the ranch house. 



The locality west of Weiser is about 75 miles north of 

 the southernmost locality on Sucker creek, and is 50 miles 

 west of the Cartright ranch which lies farthest east. 



Of the material collected, some fifteen forms are 

 reserved for later treatment because of their fragmentary 

 nature. Of the material which is readily determinable, 

 there are 30 species which may be tabulated as follows : — 



Number of species included in previously described 



Payette flora 13 



Number of new species 4 



Number of species previously known and referred 

 for the first time to Payette 13 



Total 30 



It will be seen that the previously described flora is 

 increased by 17 species, 4 of which are new, the whole 

 representing an addition of over 50 percent. That only 

 13 species or less than half of those previously known 

 from the Payette are represented in my collections may 

 be explained by the fact that only one of the localities 

 from which Knowlton secured his material was visited, 

 and this one was represented by only four species in 

 his collections. The total number of forms known from 

 the Payette may therefore be placed at 49, of which 17 

 are here recorded for the first time : — 



