456 



ened epidermis decumbent and longer. Asci narrow-fusoid, subsessile, 

 56-64 x 8-10 fi. Sporidia biseriate or oblique, narrow-fusoid, 4-nucle- 

 ate, subobtuse, straight or a little curved, uniseptate, rarely a little 

 constricted, hyaline, 10-15 x 3 /i. 



* On dead limbs of Tilia, Carolina and Pennsylvania (Schw.) 



D. leucosarca, E. & E. Proc. Acad. Nat. Sci. Phil. July, 1891, 

 p. 234. 



Perithecia gregarious, thickly scattered and enveloping the limb 

 for several inches, depressed-spherical, about \ mm. diam., white 

 inside, closely covered by the epidermis which is raised into small, 

 lead-colored pustules pierced by the minute, punctiform ostiola. Asci 

 elongated-clavate, with abundant paraphyses, 8-spored, 80-114x20 //. 

 Sporidia oblique and overlapping or biseriate, broad fusiform, slightly 

 curved, uniseptate and constricted, with 1-2 large nuclei in each cell, 

 22-30 x 8-10 p.. 



On dead limbs of Carpinus Americana, London, Canada (Dear- 

 ness). 



The bark is unaltered and there is no limiting line. 



D. rostellata, (Fr.) 



Sphceria rostellata, Fr. S. M. II, p. 476. 

 Diaporthe rostellata, Nitschke, Pyr. Gerin. p. 29S. 

 Exsicc. Fckl. F. Rh. 930. 



Perithecia thickly and evenly scattered over the stems, without 

 any distinct stroma, small (150-200 fi diam.), seated on and slightly 

 sunk into the surface of the inner bark, abruptly contracted into a 

 nearly cylindrical beak \-\ mm. long, erumpent through the epidermis 

 and making the dead canes rough and prickly to the touch. Asci 

 clavate, subsessile, 8-spored, 40-45 x 6-7 a. Sporidia biseriate, fusoid 

 or oblong-fusoid, 2-4-nucleate, often slightly constricted in the middle, 

 mostly a little curved, 12-15 x 3-3| /i, ends at first acute and faintly 

 appendiculate, finally obtuse and without any appendages. 



On dead canes of Rubus villosus, common around Newfield, N. J., 

 but often sterile. On stems of rose and Rubus, Bethlehem, Pa. (Schw). 

 on Rubus Nutkanus, California (Harkness). 



The appendages on the sporidia are faint and easily overlooked, 

 but in the young sporidia, at least, they are certainly present. D. 

 vcpris, (de Lacr.) differs only in its smaller perithecia and sporidia, 

 the latter only 8 x 12 // long. 



