IIf.mmi : On tue Die-uack Disease of Paulownia tomentosa. j^e 



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Valsa Paulowniae Mij'abe et Hemmi, sp. II. 



Stromata scattered, produced at first under periderm, then erumpent, conical 

 or wart like with round or elliptical bases, grayish-black or brownish-black with 

 many black ostioles of pcrithecia on the surface ; subcoriaceous, greenish-black or 

 dark-brown in the inside, consisting, at the upper part, entirely of the inycelial- 

 tissue and at the lower part mostly of the host-tissue, with the mycelium inter- 

 mingling in it; average size is about 2-2.5 "^"^ '" diameter at base and i-J nun 

 in depth. Perithecia immersed, subglobose with long neck, compactly arranged 

 in concentric circles, about 15 in a stroma, 1 50-300// in diameter. Asci cylindri- 

 cal or clavate, subsessile or short stalked, 32-52 x 8-10// (commonly 44 x 8.8//), 

 hyaline, eight-spored, evanescent in old [lerithecia ; spores mostly biseriate, some- 

 times irregularly arranged, allantoic! with rounded ends, hyaline, 10-18 x 2-4// 

 (commonh^ 14-16 x 3.2 /i). 



Pycnidia: stromata scattered, produced at first under periderm, then erump- 

 ent, a special flask-like shape, with rounded base; pycnidial cavity single in a 

 stroma, not lobed, forming the base of a stroma, depressedly globose or napiform, 

 about 1.5 mm in diameter and 0.6 mm in depth, thick-walled, with a single e.Kit ; 

 pycnospores hyaline, allantoid, rounded at both ends, 2.S5-S.75 x 0.88-1.75// 



