6 THE FLORA OF THE ALPS 



alpestris, W. K., and minuta, Gaud., are mountain 

 forms. 



10. ASTER, L. 



Disk -flowers bisexual, yellow; ray-flowers ligulate, 

 female, blue or purple ; involucral bracts in many rows ; 

 receptacle flat, pitted ; pappus of many rows of hairs, 

 persistent. Alpine. 



Aster alpinus, L. (PI. 60); stem 2-4 in., capitule large 

 (ij 2 in.), solitary, ray-flowers violet, involucral bracts 

 lanceolate ; high ; Switzerland, Jura, Dauphiny, frequent. 

 A . Garibaldiiy Briigg. ; capitules 2-7, much smaller, ray- 

 flowers violet ; Eastern Alps, rare. A . Wolfii, Favr. ; 

 stem 8-IO in., capitule large, solitary, ray-flowers blue, 

 involucral bracts linear ; rare; Sion. A. pyrenczus, DC. ; 

 stem ij~3 ft., pubescent, capitules solitary or 3-5, ray- 

 flowers blue, stem-leaves semi-amplexicaul ; Pyrenees. 

 A. AmelluSy L. ; stem i-ij ft, pubescent, capitules 

 numerous, corymbose, ray-flowers blue ; dry hills ; Swit- 

 zerland, Jura, Dauphiny. 



II. LlNOSYRIS, DC. 



Flowers all tubular and bisexual ; receptacle flat, pitted ; 

 pappus-hairs in two rows. 



L. vulgaris, Cass. (Chrysocoma Linosyris, L., Aster 

 LinosyriSy Bernh.), Goldilocks; capitules small, in dense 

 terminal corymbs, flowers yellow, stem simple, wiry, 

 leafy, leaves linear; open hill-sides, rare; Switzerland, 

 Jura, Dauphiny. 



Tribe INULE^S. Flowers often unisexual ; ray-flowers 

 yellow, ligulate, or o; disk-flowers tubular, bisexual; 



