3o6 



GENERAL PLANT PATHOLOGY 



Africa, the West Indies and Florida. In Florida/ Cassytha filiformis 

 is abundant on the dunes and in the rosemary scrub, where it spins its 

 yellow, or reddish-orange stems from bush to bush. 



Fungous Organisms as the Cause of Disease.— The first part 

 of this book dealt with the morphology, physiology, and taxonomy, of 



Fig. 123. — Photomicrograph of the section of a dicotyledonous host plant para- 

 sitized by dodder, Cuscula sp. At D and Z>' note haustoria entering host plant as 

 far as the bast region of the stem. (After Gager). 



the slime moulds, bacteria and true fungi. General reference was made 

 to the diseases induced by them and in the third part will be given an 



1 Harshberger, John W. : The Vegetation of South Florida. Trans. Wagner 

 Free Inst, of Science, vii, part 3, October, 1914; 86; Cf. Boewig, Harriet: The 

 Histology and Development of Cassytha filiformis. Cont. Bot. Lab., Univ. of 

 Penna., ii: 399-416, 1904. 



