Kusano, Further Studies on Acginetia indica. 297 



Pollia, Zingiber and Canna, most of them being already known 

 as natural hosts J ). Again the development of the tubercles was 

 not only very unequal on these plants, but even in the same 

 species it was different on different individuals. After two weeks 

 all the seedlings reached the stage shown in Fig. 4, but the size 

 of the tubercles during the next two weeks was very variable, 

 some attaining to the size of poppy grains and others to that of 

 the corn. The growth of the tubercles were especially vigorous 

 on Zingiber and Pollia. It was also observed that the development 

 of the parasite was less rapid on pot-plants than on those in the 

 fleld: in September it was all in flower in the field while the 

 shoots scarcely appeared above ground in the pots. It follows 

 that the growth of the parasite is most intimately connected with 

 that of the host, and in particular with the activity of its roots. 



I have already remarked that the host-root induces no getf" 

 mination when too feebly developed. The same cause mu£t 410$ 

 be assigned for the nondevelopment of tubercles on some f "o^^fel 

 plants used in the experiment. Forinstance, Alliiim^MspüJfeQwm? 

 Hemerocallis, and others produced numerous vigofrofasß'ltftfötötel&l a$# 

 appeared always to be much more rapid in growth th$i£d&Gn# 

 natural hosts such as Carex and Miscanthtis^m&sHs, ^fflafi^^there- 

 fore, that there are fit and unfit plante Wffie 9 Öos^ Wi «to^«.o'§ 



As for the intimate relation ^We^nN^MgOTn^l \U the 

 proper hosts, or plants unfit as' 1 ttie hfeft n W^m^^kb ^m&enWm 

 bring forward. It may be that the roots' o^Äe'^äfttlo ar^'ütii^ 

 for inducing the forma^^WW^Mär^ nÄÄm^ r -Eh# hair- 

 tendrils, or perhaps {W s tätärtiäi im '^h^mHmk& Äniptions 



causes the seeds ^^rWin^te^a^d^e §Yti&uMis b#M$fa' 

 causes* tfie^äe eaMgSS^^v^or) fä^iä^Pfe 3$Ta%iite 

 di-f^P^Wn^'tfat^f^.^ 31100 8 " .anoJ)9r^ooonoM io 89io9qg nißJ*i9o 

 9il,t to üoilsnimi9^ 9ilj io'l Y/iß8S909fl 9'iß ißdi eepdt moii Sne-ieMh 

 9dJ 9liriw 8JUßiq flißJmo \d yjno bolifiM -gni9d -^nnoi eAi ( ab998 



arid w^fy^W)imp%Lwm äm^mi-M c mio m^Fum 



that /^efe^^ei^^ lMvWr|> 



^Äiol0d%iJ>^?$CnJ%onfe^ of 



the host-root so that their radicles lie agamst theMatt^j^jh^r- 

 ¥»9^ÄJ^fel%,f a$clej^may d^«^l^ffi^|xS°^4 more 



development of the seedlings impossible, lust^a^^e $am$ Rlffli 



Wffie imiPstfi a Bte n ÄiP^s a HW s ttKfi>'ii <) ÄrtnHiÄd 



.anoiTioq i9d,J0 9d-t iß m9Jg^?-,too'i 



*) See foo.fe^öte r En,%9Öe^iedß3gr^age , .i , sA t 9trrtiJanI Ifioin&JoS 



