186 ROSACEAE. 



7. ARGENTINA Lam. SILVER-LEAF, GOOSE-TANSY. 



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



Leaves silvery-white on both sides. 2. 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. bracteata. 

 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. pitmila. 



Plant more or less glaucous. 

 Leaves thin. 



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



Leaflets oblong-cuneate ; scape i-4-flowered. 6. F. paucMora. 



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) Britton. (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 Canon; 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 Canon ; 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. 7000-9000 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. (Potcntilla ovalis Lehm. ; Fragaria 

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

 Divide, La Plata Mountains. 



