20 THE BOTANICAL MAGAZINE. [Vol. xxix. No.sss; 



Typhulochaeta S. Ito et Hara, gi n, 

 j jyEycelium external, sending haustoria into ^epidermal cells. - 

 Perithecia globose to globose-depressed ; asci several, -8^ 

 spored. Appendages simple, clavate, colorless. 



; Etym. : : Typhula — a genus, of Basidiomycetes, chaeta —- 

 bristle. 



T Japonica S. Ito et Hara, sp. n. 



Hypophyllous ; persistent in thin patches ; perithecia scat- 

 tered or sub-gregarious, globose to globose-depressed, 120-200 

 p in diameter, cells 10-20 p. wide ; appendages numerous (90- 

 160), spring from the upper part of the perithecium, thick- 

 walled, simple, clavate, rounded at apex, colorless, 45-65 x 

 10-15 p. ; asci 5-13, ovate, oblong-ovate or ellipsoidal, with a 

 short stalk, 70-97 x 40-55 // ; ascospores normally 8, rarely 

 6, oblong or ellipsoidal, hyalin or light yellowish, granular, 

 18-36 x 12-18 //. 



Hab. On leaves of Quercus glandulifera. 



Honshu.— Prov. Mino : Kawauye (Oct. & Nov. 1914. 

 K. Hara). 



In conclusion, I shall note here an analytical key to the 

 genera of the family, based on the results of recent researches. 



1. Mycelium wholly ectophytic or hemi-endophytic 2. 



Mycelium at first wholly endophytic 



Sub-family, Oidiopsideae. 10. 



2. Mycelium ectophytic, hyphae sending haustoria into 



epidermal cells Sub-family, Erysipheae. 3. 



Mycelium hemi-endophytic, hypha? sending haustoria 

 into mesophyll cells. Sub-family, Phyllactineae. 9. 



3. Ascus solitary ; conidia in chain, with fibrosin-body. 4. 

 Asci several 5. 



4. Appendages basal, not branched.. ....... Sphaerotheca. 



Appendages branched in dichotomous manner at the 



apex Podosphaera. 



5. Appendages simple >........ 6. 



