PLANT SUCCESSION 



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FlG. 107. Herb stages in secondary succession on abandoned upland fields 

 in the Piedmont of the southeast. (1) Horseweed dominance on a field 

 abandoned one year. (2) Aster dominance indicating two years of abandon- 

 ment. (3) Broom sedge (Andropogon) dominance in a field abandoned five 

 years, and young pine well established. 



The early stages of these two successional trends are apt to be 

 extremely slow, but later stages speed up considerably as reaction 



