DTAGNOSES OF FUT^OI FROM " SPOTTED '' APPLES 241 



circa 37 /n cl. ; s])ori.s aiireis, fuscesceiitibus, ol)lon<>-atis v. ovoideis, 

 5-&S fx long'.j 2"4-8/< lat. in cirros aureos v. fulii^ineis exsilientil)us. 



Isolated in October 191'5 from Cox's Orange Pippin. Jleisolated 

 from the same variety in January 1918, and later from Margil 

 (Jan. 81st), American Mother (Jan. 31st), and Alfriston (Feb. 2.3th). 



Synopsis of the Species and Varieties of Polyopeus. 

 This synopsis has been devised from observations on growth and 

 pycnidial development in Crabill's medium, with wheat starch 

 substituted for maize starch. A spore inoculant was used and tlie 

 cultures were incubated at 20^ C. : — 



Pycnidia usually occurring singly. 

 Pycnidia paucirostrate (usually 1-6). 



Vermilion colour absent, mj'celiuni rose to 



purple or not coloured P. pHrjyureus. 



Pycnidia angustirostrate. 



Aerial mycelium coloured ; pycnidia 

 usually nigrirostrate, numerical 

 increase rapid ; spore masses pink. Var. verus. 

 Aerial mycelium scanty and not 

 coloured ; pycnidia dark, numeri- 

 cal increase rapid; spore masses 



almost hyaline Var. in colorafus. 



Pycnidia latirostrate. 



Aerial mycelium scanty and not 

 coloured ; pycnidia dark, numeri- 

 cal increase rapid; spore masses 



almost hyaline Var. lafiroslratus. 



Aerial mycelium white ; pycnidia 

 usually nigrirostrate, numerical 

 increase rapid ; spore masses 



pale ])ink Var. nigrirosiratus. 



Pycnidia multirostrate. 



A^'ermilion colour develops late, mj^celiura 



not coloured purple P. pomi. 



Aerial mecelium scanty; pycnidia dark, 

 numerical increase rapid ; spore masses 



almost hyaline Yd.Y. verus. 



Aerial m3^celium present ; pycnidia usually 

 nigrirostrate, numerical increase slow ; 



spore masses rose Var. torj^idus. 



Pycnidia usually in stromatoid aggregations. 

 Spores relatively small, " necks " bent or 



recurved P. recurvatus, 



'* Necks " recurved Var. veriis. 



" Necks " bent Var. curvafns. 



Spores coloured P. aureus. 



Fuckelia Ijotryoidea nov. sp. 

 Stromatibus rarius solitariis v. botryose csespitoso-aggregatis v. 

 pulvinato-congestis, glabris, hyalmis, roseis v. nigrescentibus, solidis, 



