(iYMNoSI'oKANtiir.M. 



391 



GymiwsporaTigium _/'////)>//////// L. and <;. ////// //.</</^ Hart, fmm 

 i^s and needles of .//////)/<///-, communis produced: 



On Host-plant. 



Aucuparia, 



Spore-form. 



-//. 



I'll i-"* (>'.-///-/.<) .!//</, 



f 'i/,l,,l,rl /'///,/, f/'/X 



I'll rn. t (>'../7"/.<) An'-'i/"iri", 



:} 



Autiiority. 



Tubeaf. 

 I: thav. 



Amelanchier canadensis, - 



(,v,,,7,,/.<) .!//-/, 



M'lln*, - 



<>,/,//.,-) Chamaemexpilus, 



'' ^'"^ (0> 



(?) 



1>\ cniilia, 



.I/'/./, 



II. 



II. 



II. 



> | I' !>, 



thick sjnits, 



p\ .-inMia and 



' 



Thaxl 







I I ; i l ' 

 Na\va-'-hin. 



l'i-\ i it- li. 



Pyriu (Sorbus) Aria x Chamaemesp., thick spots, - 



Pyrus Malug, - - pycnidia and aecidia, 



Pyrus (Sorbus) Chamaemespilus, - [i\'cnidia onh', 



Pyrus (Sarbus) . I '""//''//". - pycnidia and aecidia, 



pycnidia and > 





 



l.t) /.,// /'/,.///v, 

 ^ ',-<l(<ti-i/i>.-i I'l/l-' 



;,,,, ;,/ // 





 





 





 - 

 



Rostrup. 



ia always precedes that 



of jiycnidial SJMM 



This i'mi-;i-; i- if juvictical iinjmrl on accmint n|' its occurrence 



nil leaves "f apple-trees. Its atiai-k- ma\ In- \i-i-y \irulcin 

 and widely distriliutc.l. l-j-ik m nn-iitiniis that n.-ar Stncklmlni 

 it is rniniimii mi apples, ami sn virulent that many t ree> have 



ry leaf >tndded wilh HiJ<li<t. ( Anieriean apple-lid-- sutlei 

 finiii /.'-,,/,//',/ ///'/<>/*', the aeeidia nf Gfymnosporangium ////'/!/;//> 

 and nt her species. See p. 4UL'. ) 



Gymnosporang-ium juniperinum (L.) ({?, conit-um lledu.i 

 ( I'.ritain and I'.S. Amei-jea >. This species. ; d-n frei|iieiii in- 

 Juniperuf communis, i> di-tinnm-hed \<\ it> shnrter spores 



which, aa I'ielel ]ininted nut, 1 ha\e a enl- HI l 'le -- papilla OVei 



each 'jerill-piip'. The t elellt nsjinfc- ale fnlllld n|) I mill I 



and needles, nn the fnriner, lin\\e\i-r. tlie\ are iniiili smaller 



/' .//,',// not /.i ;>* in if. is 1 .'."', p. :i7 s 



