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, Cuscuta sp. At D and D' 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 



» 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. Cent. Bot. Lab., Univ. of 

 Penna., ii: 399-416, 1904. 



