PLANTS AS DISEASE PRODUCERS 



301 



above the Valley of Mexico. C/. Wilson, Lucy L. W., Observations 

 on Conopholis americana. Cont. Bot.-Lab., Univ. of Pa., II: 3-19. 



The fourth series of phanerogamic parasites comprises plants of 

 the family RAPFLESiACEiE, to which a number of genera belong. Raf- 

 flesia is a genus confined to the islands off southeastern Asia, Java, 

 Borneo, Sumatra and Philippines. The whole plant is reduced to a 



Fig. 118. — Cancer-root, Conopholis americana of the broom-rope family, Oroban- 

 cheee; parasitic on roots of other plants. (From Gager, after Elsie M. Kittredge.) 



gigantic ill-smelling flower, one meter across, with parasitic attach- 

 ments suggesting fungous h3^hae, which penetrate the roots of vines 

 of the genus Cissus. Brugmansia and Cytinus are two other genera 

 of this family. Cytinus hypocistus lives on the roots of shrubs of the 

 genus Cistus in Mediterranean Europe. 



The fifth series of parasitic phanerogams includes epiphytes of 

 bushy habit belonging to the family Loranthace^. The genera 



