186 ROSACEAE. 



7. ARGENTINA Lara. Silver-leaf, Goose-tansy. 



Leaves green and glabrate above. i. A. anserina. 



Leaves silvery-white on both sides. ij. A. argentea, 



1. Argentina anserina (L.) Rydb.' {Potentilla anserina L.) Wet soil from 

 Greenl. and Alaska to N. J., Colo, and Calif. — Alt. 4000-10,000 ft. — Bear 

 River; Steamboat Springs; Ft. Collins; Como ; Platte Canon. 



2. Argentina argentea Rydb. {A. anserima concolor Rydb. ; not Potentilla 

 anserina concolor Ser.) In wet mountain meadows from Ass. and Wash, 

 to N. M. and Ariz. — Black's Lake; Upper Sangre de Cristo Creek. 



8. FRAGARIA L. Strawberry. 



Pubescence of the scape and petioles spreading or reflexed ; achenes superficial. 

 Calyx in fruit spreading; scape usually with a leafy bract. i. F. bract eata. 

 Calyx in fruit reflexed ; scape generally without a leafy bract. 



2. F. americana. 

 Pubescence of the scape and petioles appressed or ascending ; achenes set in pits. 



Plant not glaucous ; scape densely strigose. 



Leaflets over 3 cm. long, very veiny beneath ; runners numerous. 



3. F. prolifica. 

 Leaflets 1-3 cm. long, not very veiny ; runners few. 4. F. piimila. 



Plant more or less glaucous. 

 Leaves thin. 



Leaflets obovate ; scape several-flowered. 5. F. glaiica. 



Leaflets oblong-cuneate ; scape 1-4-flowered. 6. F. pauciilora. 



Leaves rather thick, firm ; leaflets oblong-cuneate. 7. F. ovalis. 



1. Fragaria bracteata Heller. In meadows and open copses from Mont. 

 and B. C. to N. M. and Calif.— Alt. 8000-11,000 ft.— Minnehaha ; Little Veta 

 Mountain ; Pike's Peak ; Georgetown. 



2. Fragaria americana (Porter) Britten. (F. vesca Pursh, in part; not 

 L.) In meadows and woods and on hillsides from Newf. and Man. to Va. 

 and N. M. — Dillon Canon ; Pennock's mountain ranch ; Rist Cafion ; Boulder ; 

 Ute Pass. 



3. Fragaria prolifica Baker & Rydb. In the mountains of Colo. — Alt. 7000- 

 10,000 ft.^Cameron Pass ; Grayback mining camps and Placer Gulch ; Pike's 

 Peak ; Seven Lakes ; bank of Poudre ; near Silverton ; Como ; Chambers' 

 Lake; Columbine; Red Mountain; Breckenridge ; Wahatoya Caiion; Pike's 

 Peak; Cheyenne Canon. 



4. Fragaria pumila Rydb. On hillsides from S. D. and Wyo. to Colo. — 

 Pike's Peak ; Gunnison ; Seven Lakes. 



5. Fragaria glauca (S. Wats.) Rydb. In meadows and open woods from 

 Mackenzie and Mont, to S. D., Colo, and Nev. — Alt. 8000-11,000 ft. — Pike's 

 Peak; Veta Mountain; Cucharas Valley, near La Veta; Pass Creek; East 

 Indian Creek; Andrew's ranch, Larimer Co.; Little Kate Basin, La Plata 

 Mountains ; bank of Poudre ; Howe's Gulch ; Como. 



6. Fragaria pauciflora Rydb. On hills from Hudson Bay and Alb. to Colo, 

 and Utah. — Alt. 7000-gooo ft. — ^North Boulder Peak; below Halfway House, 

 Pike's Peak; Andrew's Shetland ranch; North Park, near Teller; Pennock's 

 mountain ranch; along the Conejos River, north of Antonito; Minnehaha. 



7. Fragaria ovalis (Lehm.) Rydb. {Potentilla ovalis Lehm. ; Fragaria 

 Arma Rydb.) On dry hills from Colo, and Utah to Cent. Mex. — Bear Creek 

 Divide, La Plata Mountains. 



