Seaver: Some North Dakota Hypocreales 529 



Stroma springing from a sclerotium formed in 



the ovaries of plants. VI. Claviceps. 



Stroma springing from the bodies of dead insects, 



larvae, or underground fungi. VII. Cordyceps. 



I. GlBBERELLA 



Gibberella pulicaris (Fries) Sacc. Very common on old 

 corn-stalks about Fargo. This fungus is reported to have as its 

 conidial phase species of Fusarium. The mature fruit appears on 

 dead materials and its connection with a Fusarium suggests a pos- 

 sibility of its association with plant diseases. The life-history of 

 this plant should be more carefully studied. 



II. Nectria 

 a. Perithecia solitary and free on substratum. 



Nectria Peziza (Tode) Fries. This is one of the most com- 

 mon of the non-stromatic forms of Nectria and occurs on various 

 kinds of dead materials. It is perhaps most common on decayed 

 wood but is often found on old fungi and one very good specimen 

 was collected in North Dakota on a piece of old burlap sacking. 

 The species is characterized by the rather large nearly globose 

 perithecia which collapse when dried so as to resemble a small 

 Peziza, for which the species has often been mistaken. The 

 spores also are characteristic, being broadly elliptical and non-con- 

 stricted. Various collections were made at Fargo and Hawk's 

 Nest. 



Nectria episphaeria (Tode) Fries. On various kinds of 

 sphaeriaceous fungi. The species is distil 

 S( uiguinea Bolton by its occurrence in this kind of a habitat. The 



guished from Nectt 



fo 



tendency 



the two opposite sides, which tendency, although less common, 

 J s not entirely lacking in young specimens of Nectria sanguine a 

 Bolton. It is thought doubtful if the two are specifically distinct. 

 Both are characterized by the blood-red color of the perithecia. 



b. Perithecia borne on a stroma, often cespitose. 



Nectria coccinea (Pers.) Fries. Several specimens on dead 

 branches in woods near Fargo. The species is distinguished by 

 ^e scarlet- red perithecia, borne in clusters on a yellowish stroma. 



