UHYTI.-vMA. 



245 



eight needle-shaped unicellular spon^; pyenidia (spermogonia > 

 \vitli little unicellular conidia are also formed. 



The fungus attacks leaves of sycamore (A<-< / Pseudoplataniis), 

 tin- l.daok spots making their appearance in Septi-mlnT. The 

 apothecia ripen on the ground during the following summer. 1 



I .. . ' ' - tinllS ' 



shi i iiijifr .-pi 



by 1, /. 



M q.l. 1 

 mi- i uptiiiv.! 

 : -, /. 



I, \ 



KM., llil. h M IlL 



in ii i. 

 . MIL- ln\v. ,1 '.!i h 'iti|iiili:il 



section through the same leaf , showing numi 



:l]i'.tliri-i:i ..|l tin: 11] >|u-r -i. if, f. \Vf I nil tllf 1' 



-:i.i.lf.l niiil.il.- ].:irt i.'|'i. --i ht> 1 

 tllf iv 1 11 lin.ii-r i- tin- li.'lit Iuin;:il -trm 



I In.-. 11 

 (v. TiiH.-uf ili-l ) 



Rh. salicinum Pers. < I'.ritain and I'.s. A.merica). Thir|<cn.-d 

 l'lai-k wrinkled spots ;ippi-.ir trci|iii-iit ly on li\in- lc;ivrs of \-ariotis 

 Bpeciee ot willo\\. -.//. ,sv///,- Caprea, >'. cinerea, etc., als.. on some 



Willows, i.;/. X i-itii-iiliitii. Tin'-,- cn||l;iili ;ipotliccia nf tills 



. which rc;ich tln-n full maturity during tin- 96COnd 



Bummer. 



1 />;/,.-., ///i/i-, ,y,>/\ ,-/,//'.'.,/M, ,',/,, Alillll. Ill.-i.-k -|i"t- -hull 11 In t'lM'-i- "t AVi .-, 



:i|i|..-.n mi tin- If.-iM l'ln lil.n-k omatfl 10- Inn mil) ^iili,-iit n-uliir 



iiri-l end ' 'ii-|i. in-lit II--M. In. MI \\lin-li I. ii . i liii-i-il. 



Tlif -\ -ti-ln;il i,- |HI~H|MII n| tin- tiin-n- IM MiiklHiU II. 



