io THE FLORA OF THE ALPS 



1 8. LEONTOPODIUM, Br. 



Resembling Gnapkalium, but heads surrounded by a 

 whorl of long densely tomentose bracts, expanded like 

 a star. 



L. alpinum, Cass. (Gnaphalium Leontopodium, Scop.), 

 Edelweiss (PL 61). This beautiful and favourite alpine 

 plant occurs in Switzerland, Jura (Dole), Tirol, Car- 

 pathians, Dauphiny, and Pyrenees ; but is much more 

 abundant, and grows at a lower elevation, on the Alps 

 south of the Rhone valley, than in Northern Switzerland, 

 where it is largely cultivated by the guides. 



19. MlCROPUS, L. 



Interior row of involucral bracts concave, forming a 

 cap which envelops the capitules. Not alpine. 



M. erectus } L. ; stem 48 in., whole plant covered by a 

 woolly tomentum; Southern and Western Switzerland, 

 Dauphiny, rare. 



Tribe HELIANTHE^E. Ray-flowers ligulate, female or 

 neuter, yellow, or o ; disk-flowers bisexual ; leaves alter- 

 nate or opposite. Genera 20-21. 



20. BIDENS, L. 



Flowers all tubular, or ray-flowers ligulate, neuter; 

 leaves opposite. Not alpine. 



The English species, B. tripartite^, L., capitules erect, 

 leaves usually 3-partite; and B. cernua, L., capitules 

 nodding, leaves undivided; in wet places, the former 

 common. 



