PLCAVKH.HI i \. 



231 



Plowrightia morbosa [Sch.) i I'.ritain and U.S. America). 

 Black-knot of the plum tree. 1 In America this is a very 



Fio. 115. PI' 



with citfht 

 - in ^'crniiii.i- 

 ti.in. Filamentous i 



|'h SOS. (< '.'i'. t'r.iin F:ii. i 



Fie.. 114. Plof?i<ikt'iii morboia. (v. Tubeuf ].h.>t.) 



ami widely dist rilnitni disrasi- '!' various species nf 

 Prumis, i->prrially plum and clicrry. Tlic livin- branches and 

 twi-s become coated with a I-HM ni' \\aiiy excrescences, and 



at tin- same tinn- aiv more nr less thickmrd and di-runni-d. 

 A iiiyci-liiiin permrati-s tin- ' of ili.'-t- -\\cilli-n i \\i-s. and 



!'"rm- Mack CTOSty -ti-.imala in which the pcrithcria ore 

 embedded. The pci-ilhcci;i contain simple paiapli\>e- and ci^hi- 

 -poced RSCi. The spores consist of a larger and a much smaller 

 ell. (PycnO-COnidia ale pindiiced IVei|Uenil\- in ailiticial ciiltuie. 





H nniplii ' \ . .1 ilium' I; port of M .1 VMI. 



Lodeman u'../-i/.// I'nir. j-.'.rj,,,- . liuii,iin A'-. 



ra] acoonnl "t I'.l.i. k-knut and ,1 liilil 



