312 THE BOTANICAL MAGAZINE. [Voi. xxx. No. 357. 



Valsa Paulowniae Miyabe ct Hemmi, sp. n. 



Stromata scattered, produced at first under periderm, then 

 erumpent, conical or wart like with round or elliptical bases, 

 gra^'ish-black or brownish-black with many black ostioles of 

 perithecia on the surface; subcoriaceous, greenish-black or dark- 

 brown in the inside, consisting at the upper part entirely of the 

 mj'celial-tissue and at the lower part mostly of the host-tissue, 

 with the mycelium intermingling in it; average size is about 

 2—2.5 mm in diameter at base and 1—2 mm in depth. Perithecia 

 immersed, subglobose with long neck, compactly arranged in 

 concentric circle?, about 15 in a stroma, 150-300 /i in dia- 

 meter. Asci cylindrical or clavate, subsessile or short stalked, 

 32-52 X 8-10// (commonly 44 x 8.8/i), hyaline, eight-spored, 

 evanescent in old periehecia; spores mosth' biseriate, sometimes 

 irregularly arranged, allantoid with rounded ends, hyaline, 

 10-18 X 2-4// (commonly 14-16 x 3.2/i). 



Pycnidia : stromata scattered, produced at first under peri- 

 derm, then erumpent, a special flask-like shape, with rounded 

 base; pj-cnidial cavit}' 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, wnth a 

 single exit; pycnospores hyaline, allantoid, rounded at both 

 ends, 2.85-8.75 x 0.88-1.75// (commonly 4.38-5.25 x 1.4/^), 

 oozing out in a greenish black spore-horn when moist; basidia 

 hyaline, small, simple or branched, variable in length. 



Hab. On the stem of Pauluwnia tomentosa B.\il. 

 Hokkaido.— Prov. Iburi: Mombctsu (July 18, 1906. Shakin), 



Date (April 27, 1915. K. Mimma), Sobetsu (September, 



1915. K. Hashiguchi). 

 Prov. Ishikari: Sapporo (July — November, 1914; May 



10, 1915. T. Hemmi), Motomura (May 3, 1915. T. Ma- 



tsumoto; Juh', 1915. Ken. Miyabe). 

 Honshu. — Prov. Mutsu: Af)mori (August, 1903. T. Xaka- 



mura). 



