MELAMPSOKA. .".f.7 



The patches of t'"nn laricis Harti^, 1 appear ,-i> ^..Men-yellow 

 cushions on the underside of the needles. The sporophoiv^ I'mm 

 which the aecidiospores are abjointed, t'onu tin- centre i.f tin- patch, 

 the periphery being occupied by numerous sterile threads, which 

 grow out as long para])hyses : it may so happen that the who},- 

 'u-;liion con-ists only of these la-t. The formation nf Caeoma- 

 patches is preceded by tliat of little pycnidia (^permo^nnia), 

 which break out from under the cuticle. The mycelium lives 

 intercellularly, and dies after the shedding of tin- Caeoma- 

 spores. 



Melampsora betulina <l'er>. ) ( I'.ritain and I'.S. America). 

 Uredo- and teleutosporea occur on the leaves of the bin-h 

 (I'ntnlit ii/l,n). 1'lowright - found from arti- 

 ficial infection that this species product .1 

 Caeoma ////-/V/'x mi the needles of /."//'/ 

 europea. A semnd fnrm of ('<I,HI<I larit 

 was ..btaincd by Haiti-, bnth from intec- 

 tion by ,]/,/. ti-i iimliii- Tul. from the aspen, 

 ami bv M' I. /iiiiiiiliii" -l;ici[. iVcm the black 



1" 'I '^ ar - i it , i" i. u 



M. populina (Jacq.) 3 (Britain and U.S. 

 America). Dredo- and teleutosporea found 

 mi l'i>i>uliix nit/, !/ and /'. lifi/sitini/'i ni. 



M. />i,/,i//i,i,i ainl .!/. I nuinlii, are probably identical, for Haiti-' 

 ha> found the same Mi-ln m i>*r on black ami balsam poplar- 

 as on a-pcii, and ill each case lie produced Caeoma /"/'/V/s by 



mean- of the uredospores. Schroeter states that tin- M'l'ini/' 



nf ri>iilnx nii/fn produces I'm, Him ullii of ^[Illnui. 



M. aecidioides I'. < '. (I'.ritain). [Jredo- and teleutosporen on 

 leaves of -il\-cr poplar < /'. "///</ and /'. canescens). I'li-u- 

 ri^ht connects \\ith it a i'ii<i>inii-\'\-\\\ on Mi niii-ii ///s- (Caeoma 

 mercurialis). Schroeter states that the Melampsora of /'/</////> 

 t i-i-ni nlu jiroducc- i ',i.,, inn nwrcurialis. 



Til'' .!/- /il m /> it'll' of \Villo\S-, \\ere Until lecelllly Jlollpcd 



under a collective Maine, M. salicina; several species an- m-\\ 



IVci.'jIiJ/ed, otlleM rerjuil'e \cliticatioll. 



' It. ll.trtiL', ir/'.-/i'/';/. A / niil.h: iii ii il. Waldbttuinen, I'l. \. 

 ' !'!., n.'lii '/o. . 



I: il. Hi!.-, /;.''//,. ' . ,,1,-iiii'init, \i.\i., IMU; " The leaf- rn btonv . 



/ S. I ><i'i. ;' .I-/, culturt Report, 



