312 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Leaves green and glabrous or merely silky 
above. 
Leaflets usually 9, ascending, the upper 
pair decurrent, not closely ap- 
proximate...........2.2----2--- 17. P. propinqua. 
Leaflets 5 or 7, the lower spreading or 
reflexed, the upper pair not de- 
current, all closely approximate.18. P. pulcherrima. 
Potentilla effusa 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 paradoxum Greene, Leaflets 1: 189. 1905. 
Tyre Locaury: “Banks of the great western rivers, the Ohio! Mississippi! Mis 
souri! &c, to Oregon.’’ 
Rance: 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. Potentilla rivalis Nutt.; Torr. & Gray, Fl. N. Amer. 1: 437. 1840. 
Tridophyllum rivale Greene, Leaflets 1: 189. 1905. 
Type Locatity: ‘In alluvial soil along the Lewis River.” 
Rance: 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 millegrana 8. Wats. Proc. Amer, Acad. 8: 553. 1873. 
Type Locality: St. Louis, Missouri. 
Rance: 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. Pl. 499. 1753. 
Potentilla norvegica L. Sp. Pl. 499. 1755. 
Tridophyllum monspeliense Greene, Leaflets 1: 189. 1905. 
Tridophyllum norvegicum Greene, loc. cit. 
Type Locatiry: “Habitat Monspelii.’? 
Rance: 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 Vv egas mountains; Mogollon Mountains. Wet 
ground. 
5. Potentilla atrorubens Rydb. Bull. Torrey Club 24: 11. 1897. 
TYPE LOCALITY: Arizona. 
RanGE: Mountains 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 Locauity: Near Santa Rita del Cobre, New Mexico. Type collected by 
Thurber in August, 1851. 
