124 ROSALES 



1. Potentiila. 502. 



Flowers terminal, cymose. 

 Leaves pinnate. 



Leaves white tomentose especially so beneath. 



Leaves glabrous above, stipules pectinately parted. 



Tomentose, leaflets cleft half way to the midrib, margins 



not revolute. 1. P. pennsylvanica. 



Pubescent with strigose hairs, leaflets deeper cleft, margins 



revolute. Var. strigosa la. P. pennsylvanica. 



Leaves silky above, stipules entire or nearly so. 2. P. hippiana. 



Leaves not white tomentose. 6. P. paradoxa. 



Leaves digitate, 3-5 foliate. 



Stamens 10-20. 



Plant erect, flowers 6-12 mm. broad. 3. P. monspeliensis. 



Plant decumbent or ascending, flowers about 4 mm. broad. 



5. P. millegrana. 



Stamens 5-8. 4. P. pentandra. 



Flowers solitary on axillary peduncles. 7. P. anserina. 



1. Potentiila pennsylvanica L. 



Rare in the western part of the state. Deuel County; Kennedy; 

 Saunders County; Thedford. 



1a. Potentiila pennsylvanica var. strigosa Pursh. 



Common throughout the state. Dismal River; Sheridan County; Thed- 

 ford. 



2. Potentiila hippiana Lehm. 



In the northwestern part of the state. Belmont; Ft, Robinson; Har- 

 rison. 



3. Potentiila monspeliensis L. 



Common, probably over most of the state. Belmont; Cass County; 

 Cherry County; Dakota County; Lincoln; Ponca; Walton; Whitman. 



4. Potentiila pentandra Engelm. 



Probably over most of the state. Aten; Chadron; Cherry County; 

 Lincoln; Ft. Niobrara; Whitman. 



5. Potentiila millegrana Engelm. 

 Potentiila leucocarpa Rydb. 



Throughout the state. Lincoln; Louisville; Newark. 



7. Potentiila paradoxa Nutt. 



Probably occurs over most of the state, but not common. Antelope 

 County; Aten; Broken Bow; Cherry County; Lewellen; Lincoln; 

 Omaha; Sioux County; Wood Lake. 



8. Potentiila anserina L. 

 Angentina anserina (L.) Rydb. 



In the northwestern part of the state. Keith County; St. Paul; Scotts 

 Bluff County. 



Potentiila bipinnatifida Dougl. and Potentiila platyloba Rydb. occur 

 in Nebraska according to Rydberg's Flora of Colorado. 



2. Drymocallis. 499. 



1. Drymocallis arguta (Pursh.) Rydb. 



Potentiila arguta Pursh. 

 In low prairies and meadows throughout the state. Antelope County; 



