Bessey & Thompson : An Undescribed Genea 285 



Explanation of Plate 20 



Fig. 1a. Top view, ib, edge view of same ascocarp, and ic, top view 

 of another ascocarp. Natural size. 



Fig. 2. Vertical section through ascocarp. Natural size. 

 Fig. 3. Tissues from middle of wall of ascocarp. 

 Fig. 4. Tissues from exterior of wall of ascocarp. 



Fig. 5. Upper portion of hymenium showing paraphyses extending be- 

 yond the asci in a sort of secondary cortex. Ascospores and asci not quite 

 mature. • , 



Fig. 6. An ascus with ascospores not quite mature. 



Fig. 7. Apex of ascus showing two mature ascospores. 



Fig. 8. Ascospore in cross section. 



Fig. 9. Lateral view of a middle or basal ascospore. 



Note : The small divisions of the scales accompanying the figures repre- 

 sent millimeters for Figures 1 and 2, and 10 fi in all the remaining drawings. 

 Figures 3 and 4 are drawn to the same scale. 



