STANDLEY FLOEA OF GLACIER PAEK. 361 



5. Potentilla pennsylvanica L. Frequent at low altitudes, on prairie or open slopes. 

 Yukon to B. C, N. Mex., and Kans— Stems stout, 30 to 00 cm. high; leaflets 1 to 7 

 cm. long, with linear or oblong lobes; petals about as long as the sepals. 

 • 6. Potentilla platyloba Rydb. St. Mary, on rocky flats. Alta. to Colo.— Stems 

 stout, 30 to 50 cm. high; leaflets 2 to 6 cm. long, green above, white beneath; petals 

 about as long as the sepals. 



7. Potentilla glaucophylla Lehm. Common above timber line, in meadows or on 

 rocky slopes or rock slides; sometimes at middle u Uudes, on moist open slopes. 

 B. C. to Sask., N. Mex., and Utah.— Stems slender, 10 to 50 cm. high, nearly glabrous; 

 leaflets 1 to 5 cm. long, coarsely toothed, green; petals 6 to 10 mm. long. 



8. Potentilla nuttallii Lehm. Common on the east slope at low and middle alti- 

 tudes, in woods or thickets or on open hillsides. B. C. to Oreg., Colo., and Sask.— 

 Stems 30 to 60 cm. high, hairy; leaflets 3 to 10 cm. long, coarsely toothed; petals 6 

 to 8 mm. lone. 



9. Potentilla nivea L. Occasional above timber line, on rocky slopes; sometimes 

 about snow banks at middle altitudes. Alaska to Colo., Que., and Greenl.; also in 

 Eur. and Asia.— Plants densely tufted, 10 to 20 cm. high; leaves mostly basal, the 

 leaflets 1 to 2 cm. long, obovate, green above, white beneath, deeply toothed; flowers 



1 to 6, 12 to 15 mm. broad. 



10. Potentilla quinquefolia Rydb. Exposed summits, Mt. Henry and Sexton 

 Glacier. B. C. to Colo, and Sask.— Plants densely matted; leaflets deeply toothed, 

 green above, white beneath; petals slightly longer than the sepals. 



11. Potentilla blaschkeana Turcz. Frequent at low altitudes, in thickets or on 

 prairie or open slopes. B. C. and Alta. to Wyo. and Calif.-Stems 40 to 60 cm. high, 

 silky -hairy; leaflets 4 to 9 cm. long, green above, white beneath; petals 7 to 10 mm. 

 long. 



12. Potentilla filipes Rydb. Frequent on the east slope at low altitudes, in 

 thickets or on prairie or open hillsides. Alta. to N. Mex. and Man.— Stems stout, 20 

 to 50 cm. high, silky-hairy; leaflets 2 to 6 cm. long, green above, white beneath; 

 petals 6 to 8 mm. long. 



13 Potentilla gracilis Dougl. Occasional at low or middle altitudes, in woods or 

 on open slopes. B. C. to Oreg. and Mont.-Stems 30 to 70 cm. high, hairy; leaflets 

 3 to 6 cm. long, green above, whitish beneath; petals nearly 1 cm. long. 



14. Potentilla dichroa Rydb. Dry rocky hilltop near foot of Lake McDermott. 

 Oreg. to Utah and Mont.— Stems stout, 20 to 50 cm. high, densely white-hairy; leaflets 



2 to 6 cm. long, green above, white beneath; petals 6 to 8 mm. long. 



15. Potentilla viridescens Rydb. Frequent on the east slope at low altitudes, in 

 thickets or on prairie. Alta. to Wyo. and Man.— Stems stout, 30 to 60 cm. high, 

 silky-hairy; leaflets 3 to 5 cm. long, coarsely toothed; petals about as long as the 

 sepals. 



16. Potentilla anserina L. Silverweed. In thickets and about low places on 

 prairie at east entrance. Widely distributed in N. Amer., Eur., and Asia. {Argentma 

 anserina Rydb.)— Leaflets 9 to 31, obovate or oval, 1 to 4 cm. long, green on the upper 

 surface, white-silky beneath; petals rounded, 7 to 10 mm. long, yellow. 



The Blackfoot Indians employed the root as a remedy for diarrhea. Potentilla 

 anserina concolor Seringe {Argentina argeiitea Rydb.) is a form v.'ith leaflets densely 

 silvery-silky on both surfaces. It grows with the typical form, and is found about 

 the east entrance. 



17. Potentilla palustris (L.) Scop. Marshlocks. Sphagnum bogs on the west 

 slope. Alaska to Calif., Wyo., N. H., and Greenl. {Comarum palustre L.)-Perennial, 



