PUCCINIA. 



343 



hyphae forming the bottom of tin- aecidium-cup. Tin-.-.- hyphae 

 give rise to numerous short sporophores, from each of which 

 a single long chain of spores is abjointed in basipetal succession, 

 the spores being at first separated by temporary intermediate 

 cells. The sporophores numd the margin nf each aecidium do 

 not, however, idve off spores; the}' also produce chains of 

 cells ba-ipetally. but these gro\\ larger and, without the inter- 

 vention of intermediate cells, remain sterile and become joined 



Kic.. 1-:',.- /'. i 



I..WI--T l-.ii .ui'l tw.. .pill. - ii "ii the upp. i ii'l -hw i. '1 s]mt> with 



II K '|I- in whidi tliu ]i\.-i,i.|ii :m- embedded -lm\v tin- 

 tin i -if .-iili.i. (\. 'I'lili.-m" ! 1.) 



to iln-ii nri-libuiirs to I'nrm ihc |ieridium. li-ra~cd portions 

 of leaves li.-c..nie considerably thickened. The cells of [he 

 sin-le layer of palisadi- parenchyma are almoi-mally eloimated. 

 and the intercellular spaces of the spongy parenchyma, instead 

 of bi-iii-j large, arc >mall and tilled \\itli mycelium. The aeeidio- 

 Spon ipe in -Inly to -erminale on i ' ramineae. The -erni- 



tlllie ente|x [lie ||ii.-t by llie -lolnata only, and de\elnp- illlo 



an intei-eellulai- mycelium; thi> in about eiidit day> produces 

 , from cushions nr soi i \\hich loim lines, and lireak 



