314 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Rance: 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. Lyc. 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. 
RanGeE: British America to Arizona and New Mexico. 
New Mexico: Chama; Pajarito Park; Santa Fe and Las Vegas mountains; Magda- 
Jena 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. 
Tyre Locauity: Along Santa Fe Creek, New Mexico. Type collected by Fendler 
(no. 198). 
Rance: 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., Noy. 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. 
RanGcE: Saskatchewan to Utah and northern New Mexico. 
New Mexico: Costilla Valley ( Wooton). 
7. ARGENTINA Iam. 
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 outline; leaflets 1 to 2 cm. long, elliptic, incised- 
serrate; flowers 1 to 2 em. 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.......2......0.0 00.2 0c cece cece eee ee ee 1. A. argentea. 
Leaves green and glabrate above................0..0.00-20-22-2-0e- 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. 
Rance: 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. Pl. 495. 1753. 
Tyre Locauity: ‘‘ Habitat in Europae pascuis; in argillosis argentea.”’ 
Rance: Through most of temperate North America, also in Europe and Asia. 
