90 The North American Cup-Fungi 



pure white, minutely rough; hymenium plane or nearly plane, at 

 first whitish, becoming darkened by the maturing spores; asci 

 cylindric or subcylindric, 8-spored, reaching a length of about 

 200 M and a diameter of about 25 /x; spores at first obliquely 

 1-seriate, becoming 2-seriate or irregularly crowded, ellipsoid, be- 

 coming purple, then brown, becoming sculptured, 12 X 20-26 fx; 

 spore-sculpturing consisting of minute warts; paraphyses very 

 slender, hyaline. 



On damp soil in woods. 



Type locality: Woods near Yonkers, New York. 



Distribution: Known only from the type locality. 



Apparently differing from A. carhonarius in color and oc- 

 currence on damp soil where there was no trace of fire. 



14. Ascobolus xylophilus Seaver, Mycologia 3: 61. 1911. 



Apothecia gregarious, sessile, at first subglobose, expanding 

 and becoming scutellate to discoid, reaching a diameter of 

 1-2 mm., externally brownish; hymenium plane or slightly 

 concave, greenish, becoming darker with age, finally almost black; 

 asci cylindric to clavate, tapering below into a stem-like base, 

 reaching a length of 175-235 )u and a diameter of 30-35 ^u, 8- 

 spored; spores 1-seriate or becoming partially 2-seriate above, 

 large, ellipsoid, with the ends rather strongly narrowed, at first 

 hyaline, becoming beautifully purple, then brown, smooth, be- 

 coming sculptured, 13-15 X 35-38 m; spore-sculpturing taking 

 the form, of minute warts; paraphyses slender, scarcely enlarged 

 above. 



On the weathered surface of the wood of some coniferous 

 tree. 



Type locality: Geneva Creek Canyon, Colorado (elevation 

 about 9,000 feet). 



Distribution: Known only from the type locality. 



One of the few species of the genus known to occur on wood. 



15. Ascobolus striisporus (Ellis & Dearn.) Seaver, comb. nov. 



Chlorosplenium striisponun Ellis & Dearn. Proc. Acad. Sci. Phila. 1895: 429. 

 1896. 



Apothecia sessile, hemispheric, with the margin incurved and 

 notched, externally greenish-yellow, verrucose-squamose, reach- 

 ing a diameter of 1-1.5 mm.; hymenium concave or nearly plane, 

 pale-yellowish, becoming darker in dried specimens; asci clavate, 



