114 



Mycologia 



31. Hysterographium 



Hysterographium Mori (Schw.) Rehm. Plants linear, open- 

 ing with a slit-like aperture, spores muriform, brown. Common 

 on old wood of various kinds. Collected on old oak wood near 

 Fargo. 



Hysterographium Fraxini (Pers.) DeNot. A very common 

 and abundant species on bark and wood of ash. Dead branches 

 still on the tree are often nearly covered with the small, boat- 

 shaped plants. Very different from the preceding. The species 

 has also been collected on Xanthoxylum. 



32. Gloniopsis 



Gloniopsis Gerardiana Sacc. The species of this genus 

 differ from those of the preceding in that the spores are colorless 

 instead of brown. Collected on old oak wood, near Fargo. 



33. Glonium 



Glonium stellatum Muhl. Plants forming black stellate 

 masses on old wood, the individual plants linear, opening with 

 a cleft. The first appearance is a dense mass of black mycelium. 



Glonium parvulum (Gerard) Sacc. Plants very small and 

 parallel with each other, often occurring in great numbers and 

 rather closely crowded. Collected on old stumps in woods 

 near Fargo. 



Glonium lineare (Fries) DeNot. Plants larger than the 

 preceding and differing in spore characters. Collected on wood 

 at Hawk's Nest. 



34. Hypoderma 



Hypoderma scirpinum DC. Plants forming shining black 

 lines on the stems of the host with a delicate slit extending length- 

 wise through the center. On stems of Scirpus sp. I am indebted 

 to Dr. J. F. Brenckle for specimens of this species. 



New York Botanical Garden. 



