Additions and Corrections. 

The following plants are introduced instead of native, as indicated 
im the 1ext- 
Amaranthus HYBRIDUS L. and forma HYPOCHONDRIACUS L., p. 26. 
Melilotus OFFICINALIS (L.) Lam., p. 38. 
Insert p. 29, after R. abortivus L.: 
Ranculatus abortivus L. var. eucyclus Fernald. Springfield, 
L. Andrews. 
Insert p. 31, after Alyssum: 
Thlaspi ARVENSE L. Springfield, L. Andrews. 
Insert p. 32, after S. officinale (L.) Scop. var. letocarpum DC. : 
Sisymbrium ALTISSIMUM L, Springfield, L. Andrews. 

