i STILAGO. 



279 



Ustilago maydis (D.C.) 1 < I'.ritain ami U.S. Auu-ri> Thi- 



smut of Z< * M"i.t produces lar-e ami conspicuous deformation- 

 a leaves, leaf-sheath-, stems, mots, ami all part- of tin- male ami 

 female flow.-]--. These an- whitish, 

 uall-like swellings ami Misters, 

 '"iitaiiiinu' a mass of gelatinous 

 mycelium. from which spores arc 

 produced. Tin- -wellim_;s may 







attain to the size of a list, or 

 eveD lar-vr. The spores app 

 at first as dark nlivf-'jivfn 

 ma-<e- seen ihroir_;li the liuhter- 

 greeD miter tissues i' the host- 

 plant. \\'hcii mature the spmv 

 masses caii-r rujiture <>\' tin- 



e]p'l"-iii- host-tissues, and escape 



i dusty ])n\vder. The spores 



are dark-brown in '.'"lour, irregu- 



larly sj.herical in shape, covered 



with delicate -]>im-<, ami measure 



9-1 l_'u iii diameter. They re- 



main capaMe uf Lierminatinn 1'ur 



many year-. 



( )n 1'cinu sown from i he host- 



plant directly into water, very 



tew sjiores -.-rmiiiate at once, 



\'' it -own in the tollo\\iii'j 



-]'i'iu.i, r the\ i-.-adily do so. In a 



nutritive >oliuion (, .,/. jilum-juicr 



j'-lalinc) an aliiindaiit 'germina- 



tion may le obtained at any 



time. A delicate hyaline liyjiha 



i.~ given out tirsi, and after !- 



g divided ii]> hy -e\cral cross-septa, il |.roceed> to a 



a from various plac. The coiiidia -jToiit in the -elatine 



Pio 



\i 



i "'i i. 





U.S. />/''. of Agriculturt Report, l^vi. p :i^>. nli 

 iip'h.n and recommendatioiu .1^ tn to-.itm'-iit. \l-" iti,i., i 

 . V.,1. in., p. -JTI, IMIII. 



-"I'll'- piiii. ip;il .nit lint it n--, i,,i i ],, , M-I-III i'M' "I tin- I '-t ili^ un H- in 1'iiit.iin 



mil ili- 1'iiit. I Statec are I'l-.uiiL'hi (British / 88fl I nli.\\ 



.unl ^' \ MM. MI- . //..- ind I of U.S. A i, 1891) I 



