1026 



Page 



B. FORMATIONS IN THE CULTIVATED AREA 1005 



a. The Bo formation ((Irass-meadow) 1008 



The roof vegetation. 



b. The corn and potato fieids, together witli tlie weed-vegetation 



in the gardens and around the houses (Ruderal vegetation) . . . 1013 



c. The nietamorphic formation 1016 



LITERATURE 1019 



Note. In the greater part of the paper the species which produce above- 

 ground runners have been named »epiterrean« instead of »epiterranean«, those with 

 stolens or rhizomes in the ground »subterrean« instead of »subterranean«. 



