314 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Range: New Mexico and Arizona. 



We have seen no specimens of this from New Mexico, but Doctor Rydberg reports a 

 specimen collected in the State by Lemmon, no locality given. 



16. Potentilla hippiana Lehm. Nov. Stirp. Pugill. 2: 7. 1830. 

 Potentilla leucophylla Torr. Ann. Lye. N. Y. 2: 197. 1827, not Pall. 1773. 

 Potentilla pennsylvanica hippiana Torr. & Gray, Fl. N. Amer. 1: 438. 1840. 

 Type locality: Sources of the Platte, Colorado. 



Range: British America to Arizona and New Mexico. 



New Mexico: Chama; Pajarito Park; Santa Fe and Las Vegas mountains; Magda- 

 lena Mountains; White Mountains. Meadows, in the Transition Zone. 



17. Potentilla propinqua Rydb. Bull. Torrey Club 28: 176. 1901. 



Potentilla diffusa A. Gray, Mem. Amer. Acad. n. ser. 4: 41. 1849, not P. diffusa 

 Willd. 1809. 



Potentilla hippiana propinqua Rydb. Bull. Torrey Club 24: 3. 1897. 



Type locality: Along Santa Fe Creek, New Mexico. Type collected by Fendler 

 (no. 198). 



Range: Alberta and South Dakota to Arizona and New Mexico. 



New Mexico: Mountains near Grants Station; Tunitcha Mountains; Chama; 

 Santa Fe and Las Vegas mountains; Mogollon Mountains; Black Range; Sandia 

 Mountains; White Mountains. Meadows, in the Transition Zone. 



18. Potentilla pulcherrima Lehm. Nov. Stirp. Pugill. 2: 10. 1830. 

 Type locality: Not stated. 



Range: British America to Utah and New Mexico. . 



New Mexico: Gilmores Ranch; Chama; Sierra Grande. Meadows, in the Transi- 

 tion Zone. 



19. Potentilla plattensis Nutt.; Torr. & Gray, Fl. N. Amer. 1: 439. 1840. 

 Type locality: Plains of the Platte. 



Range: Saskatchewan to Utah and northern New Mexico. 

 New Mexico: Costilla Valley (Wooton). 



7. ARGENTINA Lam. 



Prostrate herbaceous perennials with a rosette of interruptedly pinnate leaves, 

 numerous slender runners bearing reduced leaves, and solitary axillary flowers ; basal 

 leaves 8 to 30 cm. long, oblong in outHne; leaflets 1 to 2 cm. long, elliptic, incised- 

 serrate; flowers 1 to 2 cm. in diameter; hypanthium almost flat; bractlets, sepals, and 

 petals normally 5, often more; stamens 20 to 25; achenes corky, grooved. 



key to the species. 



Leaves silvery on both sides 1. A. argentea. 



Leaves green and glabrate above 2. A. anserina. 



1. Argentina argentea Rydb. Bull. Torrey Club 33: 143. 1906. 

 Argentina anserina concolor Rydb. Mem. Bot. Columb. Coll. 2: 160. 1898. 

 Type locality: Not stated. 



Range: British America to Oregon, South Dakota, and New Mexico. 

 New Mexico: Gallo Spring; Tunitcha Mountains. Wet ground, in the Upper 

 Sonoran Zone. 



2. Argentina anserina (L.) Rydb. Mem. Bot. Columb. Coll. 2: 159. 1898. 

 Potentilla anserina L. Sp. PI. 495. 1753. 



Type locality: "Habitat in Europae pascuis; in argillosis argentea. J ' 

 Range: Through most of temperate North America, also in Europe and Asia. 



