I'YTNoi HYTKH M. Ill 



.1- /oospores swarming by means of a ciliuiu. In addition. 

 i --ting-spores are developed singly m in groups. 



The first effect on the host-cell of tin- cut ranee of a swarm- 

 spore is that it liecomes distinctly larger. At the same time 

 neighbouring cells are so stimulated that they multiply and 

 t'<>rm a prominent rin:.:-shaped swelling. The sporangia di-chai.:'- 

 their zoospores on the host-plant itself, and these pas- int 

 other cells of the swelling; here they form restiim-spm-es and 

 the host-cells die. Schroeter states that the restin^-spi-ivs may 

 lie found from August onward-. 



S. stellariae. Fuck. ' hi N///A//-/// ,/m/i,i ami N. nemorum. 

 The reddish-yellow hemispherical swellings are produced on leaveSj 

 stems, tl"Wer-stalks, and sepals, either isolated or as a eru-t. 

 Tli" re-t inn-spores generally form brown cru-ts. The host-lea\ - 

 may lie somewhat crumiiled, but lieyond this undergo little de- 

 formation. 1 



Chrysochytrium. 



ill Forming simple vesicles: 



Synchytrium myosotidis, Kiihn 1 1", s. America). The epi- 

 dermal cells when attacked swell up to form cliil'-shaped 

 procee>, while the cells with no fungus remain unaltered. 

 The normal hairs ..f the host-plant are fewer on diseased than 

 on healthy parts. This para-he attacks llora-ineae. e.g. Mii<>*>ti* 



IT X 1 *s 



stricta, L/'t/t<>*/>< rutni/i arvense. 



S. cupulatum. Thomas, produces red eruptions mi l'tintil 

 n,-<i< Htm and Ih-iim nrf,,/, ,/,//</ ; disease<l cells of the ho-t-plalit 

 contain led sap. 



S. punctum. Surokin. ( )n /'/"////'// lanceolate and /'. media' 



S. laetum, Sehniet. On <; : fn. 



( '1 \ Fi -rni in;.; eoiiijpound Yesicles : 



S. aureum, Schroet. Attacks many lierliace.nis plants a- well 

 a- Leaves of many shrulis and trees. Freipieiit on /. rimachia 

 .\ n in in i/ln I-'KI , Fi-iiijiii-iii, etc. The cells attacked a re swollen and 

 em-ln-cd in a patch of enlarged aeigbbouring cells. 



S. pilificum. Thoin On /'..A//////// T< ///- niill The 



vesicles are hemi-pherical, and hear on their summit- a tuft 

 "f al'in>nnally elongated hair-. 'I'lnMn found this 



' ( 'l<-iiili-n:ii i //'.'", 1894, p. 296) describes and figures a iS 



n fi in Aiin'i i-'.i i lo I 



/;. i . d. -I -"-A. botan, ' .. ls>.^, ( ,. 



