16 ILLINOIS BIOLOGICAL MONOGRAPHS [182 



On Mikania sp. ( ? ) 



British Guiana: Coverden, August 8, 1922, 763 (type); 



Wismar, July 14, 1922, 294; Rockstone, July 16, 1922, 438; 



Kartabo, July 22, 1922, 563. 

 The general characters of this fungus are Dothideaceous and it agrees 

 well with Achorella. The hypostroma is Dothideaceous in character and 

 often the stroma is so too, the perithecia touching each other and fusing 

 (Figure 24), thus the locules with undifferentiated walls appear in a stroma. 

 In other instances spherical perithecia develop upon the stroma, only parti- 

 cally or not at all attached to their neighbors. In such cases the fungus ap- 

 pears to be Sphaeriaceous rather than Dothideaceous and it clearly rep- 

 resents a border-line form between two groups. 



PHYLLACHORACEAE 



SCIRRHIINEAE 



Anisochora Theiss. aiid Syd. 

 Ann. Myc, 13:406, 1915. 



9. Anisochora tabebuiae Stevens n. sp. 

 [Figures 28 to 31, 94.] 



Spot large, 7 cm. or more, portion between veins pale yellow to brown. 

 Stromata on the veins, strongly developed epiphyllous, very slightly 

 hypophyllous, black, 0.7 to 2 mm. wide, of indeterminate length, frequently 

 7 cm. or more, rarely spreading over the leaf surface as a flat crust. Stro- 

 mata developing as a thick (about 200 to 450/^) cushion of vertical, parallel 

 (palisade-like) hyphae between the epidermis and the palisade tissue, 

 covered by a black, epidermal clypeus. Phloem browned, due to mycelial 

 invasion. Locules few, 1 to 4 in cross section of a stroma, subglobose, 

 275 to 460;u broad, about 310ju deep, ostiolate. Asci 8-spored, uniseriate or 

 inordinate, 90 x 10 to Wix. Spores 11 to 13 x 5.5 to 7/i, hyaline, unequally 

 1 -septate, lower cell very small. Paraphyses few. 



On Tabebuia sp. 



Trinidad: St. Augustine, August 13, 1922, 847. 



The stromata upon the veins form a very distinctive feature (Figure 94) 

 and from their nature indicate the migration of the fungus through the 

 veins which is also substantiated by the evidence of phloem infection 

 found in cross sections. In some instances there are breaks, sometimes a 

 centimeter long, in a stroma, though there are evidences in the color of the 

 vein that it is diseased in the non-stromatic portion. The palisade stroma 

 is nearly colorless and consists of very thin walled cells of remarkable thick- 

 ness (about 18m), (Figures 28 to 30). On the hypophyllous side of a vein 

 there is a slight development of palisade stroma similar to that on the upper 



