42 DISEASES OF CULTIVATED PLANTS 



portion of the wound. This form of injury is mostly present 

 on plants grown under glass, and is especially common on 



FIG. 5. Intumescences, or sap-warts on stem of 

 an Acacia grown in a hot-house. Nat. size. 



species of Solatium and allied plants. It is, however, also met 

 with on other plants, as species of Mimosa, Acacia, Camellia, 

 etc. It is occasionally observed on plants growing outside, 



