312 CONTEIBUTlONS T'EOM THE ISTATIOl^AL HEEBAEIUM. 



Leaves green and glabrous or merely silky 

 above. 

 Leaflets usually 9, ascending, the upper 

 pair decurrent, not closely ap- 

 proximate 17. P. propinqua. 



Leaflets 5 or 7, the lower spreading or 

 reflexed, the upper pair not de- 

 current, all closely approximate. 18. P. pulchemma. 



Potentilla ejfusa Dougl. and P. oblanceolata Rydb. have been reported as occurring 

 in New Mexico by Dr. P. A. Rydberg, but we have seen no specimens of either of 

 these from the State. 



1. Potentilla paradoxa Nutt.; Torr. & Gray, Fl. N. Amer. 1: 437. 1840. 

 Tridophyllum paradoxuvi Greene, Leaflets 1: 189. 1905. 



Type locality: "Banks of the great western rivers, the Ohio! Mississippi! Mis 

 Bouri! &c. to Oregon." 



Bange: Washington and Ontario to New York and New Mexico, south into Mexico; 

 also in Asia. 



New Mexico: Santa Fe; Mesilla Valley. Wet ground. 



A common species in the sandy bed of the Rio Grande, often carried into cultivated 

 fields by irrigating water. 



2. PotentiUa rivalis Nutt.; Torr. & Gray, Fl. N. Amer. 1: 437. 1840. 

 Tridophyllum rivale Greene, Leaflets 1: 189. 1905. 



Type locality: "In alluvial soil along the Lewis River.'' 

 Range: British Columbia and Saskatchewan to Mexico. 

 New Mexico: Santa Fe Creek ; above Mimbres. Wet ground. 



3. Potentilla millegrana Engelm.; Lehm. Delect. Sem. Hort. Hamb. 1849: 11. 



1849. 

 Potentilla rivalis inillegrana S. Wats. Proc. Amer. Acad. 8: 553. 1873. 

 Type locality: St. Louis, Missouri. 



Range: Washington and Manitoba to California, New Mexico, and Illinois. 

 New Mexico: Gila; Sapello Creek; Grant County; Sandia Mountains; north of 

 Ramah. 



4. Potentilla monspeliensis L. Sp. PI. 499. 1753. 

 Potentilla norvegica L. Sp. PI. 499. 1755. 

 Tridophyllum monspeliense Greene, Leaflets 1: 189. 1905. 

 Tridophyllum norvegicum Greene, loc. cit. 



Type locality: "Habitat Monspelii.'' 



Range: British America to Maryland, Kansas, Mexico, and California; also in 

 Europe and Asia. 



New Mexico: Tunitcha Mountains; Farmington; Chama; Pajarito Park; moun- 

 tains near Grants; Santa Fe and Las Vegas mountains; Mogollon Mountains. Wet 

 ground. 



5. Potentilla atrorubens Rydb. Bull. Torrey Club 24: 11. 1897. 

 Type locality: Arizona. 



Range: Mountams of Arizona, New Mexico, and northern Mexico. 

 New Mexico: Las Vegas Mountains; Magdalena Mountains; Mogollon Mountains; 

 Santa Rita. Transition Zone. 



6. Potentilla thurberi A. Gray, Mem. Amer. Acad. n. ser. 5: 318. 1854. 



Type locality: Near Santa Rita del Cobre, New Mexico. Type collected by 

 Thurber in August, 1851. 



