370 PLANT DISEASES 



papillate, about i mm. diam.. smooth ; asci cylindrical or 

 subclavate, base narrowed, 160-170x8-10 /^, 8-spored ; 

 spores obliquely i-seriate, fusoid, guttate, both ends acute, 

 brown, 28 X 6-7 /^. 



Rosellinia ligniaria. Nits., Fuckel's Symb. Myc, 150 (1869- 

 70). — Perithecia gregarious, globoso-conic, superficial, black, 

 sparingly covered with minute hairs, i mm. diam. ; asci 

 cylindrical, stipitate, 8-spored, 80-96x10-12 /x ; spores 

 obliquely i-seriate, ends obtuse, blackish-brown, continuous, 



16X8 [X. 



E-osellinia necatrix, ^^x\. = Dematophora necatrix, Hartig. 

 — Perithecia densely gregarious, seated on a byssus or 

 subiculum, obovate, blackish, nearly 2 mm. diam., surrounded 

 at the base by fascicles of conidiophores ; asci cylindrical, 

 8-spored ; spores fusiform, often inaequilateral, continuous, 

 brown, 40 X 7 /^ ; paraphyses filiform ; conidiophores spring- 

 ing from small black sclerotia, fasciculate, branched; conidia 

 elliptical, hyaline, 2-3 /x long ; pycnidia springing from 

 sclerotia, black, subglobose.; stylospores hyaline, elliptical, 

 continuous, or 1-3 celled, averaging 25x8 //. 



Rosellinia radiciperda, Massee, Keia Bull., 1896, p. i, 

 I pi. — Ascophores densely gregarious, seated on a black, 

 velvety byssus, globoso-depressed,mamillate, black, glabrous, 

 large; asci cylindrical, apex truncate; spores 8, i-seriate, 

 elliptic-fusiform, slightly inaequilateral, continuous, brown, 

 40-45X12 ji ] paraphyses filiform; pycnidia globoso- 

 depressed, sparingly pilose, black, stylospores elliptic-oblong, 

 continuous, hyaline, continuous, 7-8 X 4-5 /^ ; conidiophores 

 springing in fascicles from small black sclerotia, much 

 branched at the apex ; conidia terminal on the branchlets, 

 hyaline, continuous, elliptic-oblong, 7X4/^. 



