110 



Mycologia 



II. ASCOBOLUS 



Ascobolus immersus Pers. Plants small and not easily seen 

 as they closely resemble in color the substratum on which they 

 occur, but often occurring in abundance. Characterized by the 

 asci filled with dark purple spores which project far above the 

 surface of the hymenium. The spores in this species are 

 unusually large. Collected near Sykeston. 



12. Saccobolus 



Saccobolus Kerverni (Crouan) Boud. Plants small, golden- 

 yellow, with the hymenium dotted with the ends of the asci con- 

 taining dark purple spores. A common species on dung of cows. 

 Specimens collected at Sykeston. 



Saccobolus violascens Boud. Differs from the preceding in 

 that the plants are violet instead of golden-yellow. The species 

 also differs in microscopic characters. Specimens collected at 

 Sykeston on horse dung. 



13. Trichopeziza 



Trichopeziza sulphurea (Pers.) Fuckel. Plants small, 

 occurring on herbaceous stems and characterized by a dense 

 covering of sulphur-yellow hairs. Collected at Fargo. 



Trichopeziza Tiliae (Peck) Sacc. Plants small, white, and 

 clothed externally with a dense covering of white hairs. Com- 

 mon and abundant on the bark of dead branches of basswood 

 (Tilia Americana) . Collected commonly about Fargo. 



14. Dasyscypha 



Dasyscypha nivea (Hedw.) Sacc. Plants stipitateand clothed 

 with a dense covering of white hairs. Specimens collected on 

 herbaceous stems at Hawk's Nest. The species is common on 

 decaying wood, especially oak. 



15. Helotium 



Helotium citrinum (Hedw.) Fries. Plants very bright 

 lemon-yellow, and usually occurring thickly gregarious on old 



