477 

 .V. salicina, (Pers.) 



Sphceria salicina, Pers. Obs. I, p. 64. 

 Valsa salicina, Fr. Summa Veg. Scand. p. 412. 

 Exsicc. Fckl. F. Rh. 614, 615. Kz. F. Sel. 147, 345. Rehm Asc. 82. Thum. M. U. 468, 

 869. Cke. F. Brit. Ser. I, 377. F. Sax. 259, 432. Roum. F. G. 558. M. March. 145, 

 461, 1724.-1,111. F. Hung. 173. EH. & Evrht. N. A. F. 2d Ser. 1951. 



Stromata thickly scattered, depressed-conical, truncate, slightly 

 prominent, pustuliform, closely covered by the epidermis, except the 

 small, whitish disk. Perithecia 6-12 in a stroma, circinating in the 

 unchanged substance of the inner bark, with very short and slender 

 necks and minute, black, globose, perforated ostiola erumpent around 

 the margin of the disk or irregularly scattered over it, scarcely ex- 

 serted. Asci narrow-oblong or clavate, 4-8-spored, 40-65 x 7-8 //, 

 subsessile. Sporidia allantoid, hyaline, slightly curved, 121 8 x 2J-4 /i 

 (in the 8-spored asci), 20-30 x 5-7 jj. (in the 4-spored asci). 



On dead willow limbs, Carolina and Pennsylvania (Scliw.). also 

 New York, New England and Canada. 



V. ambiens also occurs on Salix, but is larger throughout from 

 stroma to sporidia. 



V. sordida, Nits. Pyr. Germ. p. 203. 



Valsa deplanata, Fckl. Enum. Fung. Nassov. p. 55. 

 Exsicc. Sydow, M. March. 464. Rehm Asc. 729. Krgr. F. Sax. 173. 



Pustules numerous, thickly and evenly scattered, only slightly 

 prominent, 2-3 mm. diam. Perithecia 6-12 together, subcircinate in 

 the unaltered substance of the inner bark, globose or subcomprevsiMi. 

 medium size (J-| mm.). Ostiola short, thick, rounded at the apex and 

 finally with a rather narrow pore, erumpent mostly around the margin 

 of a grayish, finally brownish, disk. Asci clavate, 40-45 x 8 /i (p. sp.), 

 or including the stipe-like base 50-60 fi long. Sporidia subbiscriato. 

 cylindrical, hyaline, only slightly curved, 8-10 xl| fi in the Iowa 

 specc, 9-11 x 1| /jl in Krieger's specc, and 10-12x2 jul mostly in Rehm 

 Asc. Spermatia 4-1 //, borne on long, slender basiclia and oozing out 

 in yellow cirrhi. 



On dead Populus, Iowa (Holway), California (Harkness). 



Differs from V. ambiens and V. salicina in its slenderer sporidia 

 and spermatia. 



V. boreella, Karst. My col. Fenn. II, p. 141. 



Exsicc. Sydow, M. Marchica, 1826. Ell. & Evrht. N. A. F. 2d Ser. 2520. 



Perithecia 8-20 together, circinating in the unchanged substance 

 of the inner bark, subglobose, about \ mm. diam., subdecumbent, necks 

 slender, converging. Ostiola obtuse, rounded, finally sublaciniatelv 



