M. ..7, 



on various species of >V,, //<// //* (without (lmil.it nn 

 iii-n //.s/.s). Aecidia are unknown. Hi- relate- it \<> /'//</////////// 

 /'/W/<r/ Kleh. on needles of /V////x ,s///r/.s//-/\. 



C. synantherearum l-'r. A provisional < -olleciive name t-i 

 accidia on A<l> m-.s/V-.s. Petasites, fin-n/ii/, Senecio, etc., tin- life 

 hi-tury df which is as yet unknown. 



C. campanulae (Pers.) d'.ritahn. [Jredo- and teleutospores 

 on Campanulaceae {Campanula and /'/>///< /////< The 

 form i- Peridermium /Y^//-/'////' <n\ pine-needle-. 



C. pulsatillae (Sir.). Credo- and teleiito-purc- n 

 I'lil^itlUii and .1. firiifi n*i*. Accidia unknown. 



C. ipomoeae (Schwein). [Jredo- and teleutospores i-n species 

 of cultivated I/,,, ,in,i, i in I'nitcil Stale-. Accidia unknown. 



Fi'-dier ' olitained pycnidia on needles of jiine )>y infection 

 \vitli a ('iiliu*i><,,-iiiin from < '<i m // n nl<i Ti-m-li< limn. 



Chrysomyxa. 



The teleutospores .ire formed doely together in yellow so] i ; 

 each spore Consists nf an acropetal scries i.f cells, the distal 

 one .if which, without leaving the sums, germinates to jirudii'c 

 a |ironiM-clium of several cells. 1 "ivdusporcs arc nut a!v, 

 present. The acci.lia have well-developed peridia. 



Chrysomyxa rhododendri (\'>. C.). 2 Thi- i> a cummun ru-i 



oil the Alp- where the Alpilie-ru>e I IHnalm!, ml rmi j'l i-i-iii/iin ii 111 and 

 /.'. li'irxiilniii) occui's. Immediately after the hreak-up of the 

 uinter little dark-red cushions of this rust appeal- un the under- 

 -ide of the leave-. These contain the sori of teleui<pui<-. 

 already partially dc\eluped during the previous autumn, and 

 nuw. alter hiliematiuii, ready tu increase in si/e and to rupturt- 

 the hofit-epidennis i I-'i.^. - 1 1 i. Tin- telentuspurc- so e\p..-ed 

 germinate \\ithuut lea\in- the sorus, and pruduce four-celled 

 pi'umycelin, \\ith steri'jmata. from cadi uf \\hidi a sin-le 

 -p"iidium is ahjuintcd. The -jiuridia make their escape in 

 'uiic. and ali-jhlin-j uu the unfoldin- needle- uf the spruce 

 I/'/-." excelsa), the\ germinate at once and ju'oiluce ./ 



ill,',, i , ,,n ,,,, the lili-ter-ru-i uf the spruce (Fig. _ 1- i. 



An intercellular m\cdinni i-. de\-d,.ped in the apruce-needl 



\ |\ . |x'i| 

 - I I.- I'.. u \ . /I"'" a. '/. ' -i. I ^7'. l 



