^^fe^-^:? k * V ' 'jffii^^WH^^-' " '^ V ' 



i$jjjf? t> ~ ' . ~v- t-i&y^,/^^ ? : '.J6- v * r. 



PIG. 27. Barren area in old field, product of 

 severe erosion. 



PIG. 30. Broomsedgre clump coming- into local 

 dominance. 



EVIDENCE OP SXJCCESSIO 



PIG. 28. Lichens on pedestals of soil, resist- 

 ing further erosion. 



FIG. 31. Dewberry overcoming competition 

 of poverty grass and weeds. 



PIG. 29. Moss (lower center), soon to be 

 choked out by adjacent poverty grass. 



PIG 32. Blackberry rising above and domi- 

 nating dowberry and other community plants. 



