Explanation op Plate 41 



I. Hystekographium kansense Ellis & Everhart. 



a. Plants natural size on bark. 



b. One plant X 10. 



c. Ascus with spores and paraphyses X 800. 



d. Two spores X 1500. 



II. Hystekographium mori (Schw.) Eehm. 



a. Plants natural size. 



b. One plant X 10. 



c. Ascus with paraphyses and spores X 700. 



d. One spore X 1500. 



III. Hystekographium fraxini (Pers.) DeNotaris. 



a. Plants natural size. 



b. Ascus with parapliyses and spores X 800. 



e. One spore X 1500. 



162 



