CVSTolTS 



125 



Besides conidia, spherical oospores may also he present : these 

 are generally produced mi the stems of tin- ho-t-plant, but al-o 

 on Hower-stalks and ovary-walls. 



The spherical conidia arise in simple chains on short coni- 

 diophores, and are loosely connected by tiny intermediate cell-. 

 The coiiidial cushions rupture the epidermis and the ripe conidia 

 fall off to produce hiciliate .-warming cells (Fi^. : ( >4). The>e 

 ui\'e rise io -eini-tul>e- which enter the stomata of seedlinx> and 



I . !'!'. w 



r.ilij.lial 

 ) 



ii>li liyi-rtri.].liii-.l I. II.. \'. 



OCCUpy the rlil;llL'>l )'i.-t:l!.-, .si-p:iU :ili<l . (hi. 



develop io inl-Tcrllular mycelia, tine short lateral t\\i;j> of 



which jtiel'ce the \\;dl of the ho-t-cells and become little 

 >|ihe| ic;d h;ill-lol i;i. 



The ..... jonia ai'i>e as thick-walled spherical s\\ cllin-- on the 



mycelium. The antheridium, after applying it -elf to the o 



\\iden- and projects a line fert ili/al ion-t nhr tliioii-h the \\.d 



the egg-Cell. After lerl ili/atioll i- ellected, the 6gg-l ell 1- BDCl 



iii a lirm uneven meml>i-ane. and hiln-i'iiate- inside the oo-onmm. 

 In Spring the pla-ma of the OOSpOre l-inis numelou- hiciliate 



