474 Bulletin 315 



Hab. Isolated from oat field soil, July, 19 10, Cornell University, 

 Ithaca, N. Y., by the writer. Plant pathology herbarium No. 5,907. 



Peritheciis sparsis vel casspitosis, immersis, demum saepe subliberis, 

 membranaceo-mollicuhs, fragilibus, atris, opacis, 250-525/x diameter; 

 ostiolo papillulato, cxscrto; ascis octosporis, lato-clavatis, apice rotundatis, 

 stipite elongato gracile, 45-60 x 16-30/x; stipite 30-40/i long, sine para- 

 physibus; sporidiis fasciculatis, rectis vel parum curvatis, 3-septatis, 

 curvulis utrinque, constrictis alte ad septum, facile secedentibus, initio 

 hyalinis, demum atrofuscis, opacis. 



Hab. In humis, Ithaca, N. Y., Amer. bor. 



Differs from 5. minima in size and shape of ascus, larger perithecium, 

 and fasciculate spores; from 5. chrysospora in larger perithecium, in size 

 of ascus, and in smaller spores arranged in fasciculate fashion. 



This fungus has been grown continuously for over one year on nutrient 

 agar, soil solution agar, and straw plugs, without variation. Attempts 

 have been made repeatedly to find paraphyses in young material by 

 staining with iodin and eosin. None have been found. 



Species of Fungi Imperfecti 

 Sphaeropsidales 



Chaetomella horrida Oud., Arch. Neerl. Sci. Nat. scr. 2, 7: 280-281. 

 pi. 7, fig. 2. 1902. 



Mycelium creeping, from white to darkish, branched, septate; pycnidia 

 180 by 140M, superficial, scattered, ovate, without ostiole, brown (Sacc. 

 Chromot. No. 9), in transmitted light dark brown, with setas on all sides; 

 sets of the old pycnidia rising high, downward black and opaque, upward 

 lighter, dark or dilute olive, septate, when young smooth, when old slightly 

 roughened, once or many times dichotomously branched, ultimate branches 

 awl-shaped; spores broad elliptical, biconvex, commonly apiculate on both 

 ends, very dilute steel-colored, 5.5-7 by 3.5-4/x; basidia toward the base 

 dark, above hyaline, three times length of spores. 



Hab. Isolated from a piece of birch from humous soil of the wood 

 called Spanderswoud, near Bussum, Holland, May 12, 1901, Koning. 



Apparently this species is near Ch. furcata Cooke & Massee, Grev. 17: 

 43. 1888; Sacc. Syll. Fung. 10: 270. The species differs by its ovoid, 

 brown perithecia, by the apiculate, pale steel-colored, and much smaller 

 spores (5.5-7 by 3.5-4)11 as compared with lo-ii by 8/x). 



Chaetomella tortilis Delacroix, Bui. Soc. Myc. France 7: 106. 189^,. 

 vSacc. Syll. Fung. 10: 272. 1891. r....rj. 



Pycnidia without ostioles, nearly semiglobose, gregarious, covered with 

 setas, 140-160/iin diameter; setao tortuous, often curved to form hooks, 



