459 



a black line, subglobose, black, at first covered, matrix finally i-imose- 

 fissured, and the short ostiola emergent. Asci clavate. Sporidia 

 lanceolate, 4-nucleate, hyaline, 15-16 x4 //. 



On stems of Geranium, California (Harkness). 



1). elephantina, Cke. & Hark. 1. c. 



Pustules valsiform, rarely scattered. Perithecia buried in the 

 bark or attached to the wood, globose, black, with slender, cylindrical, 

 elongated, flexuous, emergent ostiola. Asci clavate, 8-spored. Spo- 

 ridia lanceolate, 4-nucleate, soon uniseptate, hyaline, 12x3| ft. 



On stems of Geranium, California (Harkness). 



D. Asclepiadis, E. & E. Bull. Torr. Bot Club, X, p. 98. 



Stroma forming black patches on the surface of the stem \ cm. 

 long or, by confluence, much longer, limited by a deeply penetrating, 

 black, circumscribing line. Perithecia scattered, globose, \ mm. diam., 

 buried in the substance of the stem, but not deeply. Ostiola rather 

 stout, cylindrical, subobtuse, \-\ mm. long. Asci (p. sp.) 35-40 x 9 ft. 

 Sporidia biseriate, elliptical, constricted in the middle, 3-4-nucleate, 

 subobtuse, 10-12 x 2,-^ //. 



On dead stems of Asdepias tuberosa, Newfield, N. J., and on 

 Asclepias Cornuti, Iowa (Holway), 



D. exercitalis, (Pk.) 



Sphieria exercitalis, Pk. 30th Rep. p. 66. 



Diaporthe exercitalis, Sacc. Syll. 2641, Cke. Syn. 2429. 



Perithecia minute, crowded, arranged in long strips, at first cov* 

 ered by the epidermis, which is at length ruptured in long cracks, 

 through which rise the short, spine-like, subacute ostiolaj or oftener 

 the stem is more or less blackened and raised into oblong tubercles, or 

 elongated ridges, pierced, but not ruptured by the ostiola. Asci sub- 

 cylindrical, 42-50 X 6-7 [i, subsessile. Sporidia subbiseriate, oblong- 

 fusoid, 4-nucleate, colorless, 12 x 2i-3 [i. 



On dead herbaceous stems, not much decayed, Oatskill Mts., N. Y. 

 (Peck). 



D. immutabilis, Cke. & Hark. Grev. XIV, p. 9. 



Stroma variously effused and interrupted, scarcely discoloring the 

 surface of the stem, but limited by a black line within. Perithecia 

 scattered, globose, with short, punctiform ostiola. Asci clavate, 8- 

 spored. Sporidia biseriate, sublanceolate, straight or slightly curved, 

 2-4-nucleate, uniseptate, hyaline, 12-14 x 4 //. 



On dead stems oi Scrophularia, California (Harkness). 



