D. yuccrcgena, (Cke.) 



Sphczria yucc&gena, Cke. Grev. VII, p. 12. 

 Didymospheeria yuccogena, Sacc. Syll. 2673. 

 DidymosphcErella yuccogena, Cke. Syn. 4673. 



Gregarious, covered. Perithecia subprominent, black. Asci cylin- 

 djical. Sporidia uniseriate, elliptical, uniseptate, constricted, brown. 

 28 x 10 IJL. 



On Yucca, California (Harkness). 



D. tenebrosa, (B. & Br.) 



Sphceria tenebrosa, B. & Br. Ann. Nat. Hist. No. 649, tab. 12, fig. 35. 

 Didymosphceria tenebrosa, Sacc. Syll. 2685. 

 DidymosphcErella tenebrosa, Cke. Syn. 4689. 



'Perithecia scattered irregularly, covered bv the cuticle and sub- 



/ * */ 



jacent cells, which are traversed by dark, cellular mycelium here and 

 there giving rise to short, toruloid threads. Asci large, cylindrical, 

 obtuse, slightly attenuated below. Sporidia biseriate, composed of 

 two apposed, irregular cones, which contain at first a single large glob- 

 ule, but at length have two irregular endochromes. Remarkable for 

 its curious mycelium and large sporidia." Cke. Hndbk., 2607. 

 On Vernonia Novebomcensis, Pennsylvania (Michener). 



D. circinaiis, Hark. Bull. Cal. Acad. No. 1 (1884), p. 44. 



Kpiphyllous. Perithecia gregarious in circular spots 1-6 mm. 

 diam., covered by the epidermis and staining the matrix around the 

 ostiolum. Asci cylindrical, sessile, 8-spored. paraphysate, 66 x 6 IJL. 

 Sporidia oval or oblong, uniseptate, slightly constricted, olive-brown. 

 5-7 x 3-4 p. . 



On the early form of leaves of Eucalyptus globulus. California 

 (Harkness). 



D. pardalina, E. & E. Journ. Mycol. II, p. 102. 



Perithecia gregarious in groups of 4-6, whose position is indicated 

 by suborbicular or elliptical black spots 2-4 mm. in diam., or by con- 

 fluence more, entirely sunk in the substance of the stem, rather large 

 (| mm.), with thick, coriaceous walls, and minute, punctiform ostiola. 

 not elevating the epidermis. Asci cylindrical, 150-200x12-15 a. 

 Sporidia uniseriate, oblong-cylindrical, olive-brown, uniseptate and 

 constricted, slightly curved, ends obtuse, 22-30 x 8-10 p. 



On dead stems of Spartina polystachya, Louisiana (Langlois). 



D. baccliaus, Pass, in Thiim. Pilze des Weinst. p. 134. 

 Perithecia immersed in the bark, minute, seriate, subglobose, the 



