48 ERYTHEA. 



Cytispora Macluras. On dead limbs of Madura aurantiaca, 

 Dec. 10, 1895 (No. 1999). 



Stromata subcuticular, irregularly scattered, or here and there 

 subconflueut, 1-1^ mm. diam., convex, sunk in the unaltered sub- 

 stance of the bark, 4-8-celled, the cells often assuming the form of 

 perithecia with separate, black and shining, smooth-tipped erumpent 

 ostiola, or with the ostiola united and opening through a single 

 central pore. Sporules allantoid-hyaline, only slightly curved, 



This is evidently the spermogonial stage of Vnlsa Maclurse C. & E. 



Cytispora Amorphae. On dead Amorpha fruticosa, Feb. 26, 

 1896 (No. 2049). 



Stromata abundant, about ^ mm. diam., black, multicellular, deep 

 seated in the inner bark, extending to the wood but not changing its 

 color. Epidermis perforated by the prominent stout ostiolura. 

 Perithecia few (3-6) in a group. Sporules subacute, hyaline, slightly 

 curved, 4-6x1-1^/^. 



Spermogonial stage of Valsa Amorphse E. & E. (No. 2048). 



Cytispora sambucina. On dead branches o£ Sambucus Cana- 

 densis, April 10, 1896 (No. 2111). 



Stromata convex, 1-1| mm. diam, slaty -black inside, multilocular, 

 raising the bark into pustules, opening by a single pore. Sporules 

 oblong-allantoid 6-7x1 |^/j. 



Cytispora leucosticta. On dead branches of Pyrus Malus, 

 April 21, 1896 (No. 2123). 



Stromata abundantly scattered over the host ^— | mm. diam., 

 seated on the surface of the inner bark, not changing its color or 

 that of the wood. Pustules soon erumpent, presenting a crater-like 

 pruinose disc pierced by a single pore. 



Perithecia black, subcircinate, 8-12 in a stroma. Sporules hya- 

 line, curved, suballantoid 7-1 0x1^//. 



Differs from Cytispora leucostoma (Pers.) in the form of its stroma 

 and its larger sporules. 



Sphaeropsis Ailanthi. On dead shoots of Ailanthus glandu- 

 losa, April 17, 1896 (No. 2118). 



Perithecia thickly scattered, globose, ^ mm. diam., buried in the 

 inner bark and raising the epidermis into pustules which are soon 



