84 BKITISE BIERACIA. 



H. tatiophylhm. — (See above.) 



S. argmteum. — (See above.) 



JSr. nitidnim. — Not described by Continental Authors. 



H. murorum. — (See above.) 



H. ccBsium. — (See above.) 



S. stelUgerum. — Southern Europe (France. Piedmont.) 



H. aggregatwm. — Not described by Continental Authors. 



H. vulgatum. — (See above.) 



UPPER AIPINE RE&ION. (2500 to 4000 ft. elevation.) 



Occurring on, exposed cliffs : rarely /ound below 25i)0yiei 

 elevation. 



H. alpinwm. — Arctic zone of Europe, Asia and America (Green- 

 land. Iceland). Also in Central and Southern Scan- 

 dinavia. Germany. Switzerland. Hungary. Scarce in 

 Southern Europe, and not known in the Pyrenees. 



J?, hohsericeum. — Probably occurring in the regions where H. al- 

 pinum is found. Norway ? Prance ? 



M. eximium. — Not yet distinguished by Continental Authors. 



S. eahnduliflorum. — ^Not yet distinguished by Continental Authors. 



M. ghlotum. — ^Not yet distinguished by Continental Authors. 



H. ^onfonfum.— Northern and Central Europe. 



