Seaver: The Hypocreales of North America 187 



Perithecia cespitose on an erumpent stroma, globose, smooth, at 

 first bright red becoming blackish, entirely black in weathered 

 specimens, collapsing becoming pezizoid ; asci clavate, 85-100 

 X 10-12 mic, 8-spored but with spores often obscured by numer- 

 ous, allantoid spore-like bodies which are present in the ascus ; 

 spores fusoid, 1 -septate, with a short curved appendage at each 

 end, 10-15 X 2.5-3 m i c - 



On branches of deciduous trees and shrubs; Betula, Corylus, 

 Crataegus, Lonicera, Populus, Rhus, Salix, Symphoricarpus. 



Type locality: Europe. 



Distribution : New Jersey to Ontario and N. Dakota. 



Exsiccati: Ellis, N. Am. Fungi, 159. Other specimens ex- 

 amined : Delaware, Commons; New Jersey, Ellis; N. Dakota, 

 Brenckle; Ontario, Canada, Dearness. 



The species is very distinct in its spore characters. 



5. Creonectria pithoides (Ellis & Everh.) 

 Nectria pithoides Ellis & Everh. Proc. Acad. Nat. Sci. Phil. 1890 : 

 247. 1 89 1. 



Stroma erumpent, yellowish; perithecia seated on the stroma 

 in dense clusters 1.5-2.5 mm. in diameter, individual perithecia 

 bright red, collapsing so as to become truncate, resembling the 

 head of a barrel with the ostiolum appearing as a light trans- 

 lucent dot in the center, 200-250 mic. in diameter; asci cylin- 

 drival, 70-80 X 5 mic, 8-spored; spores elliptical, i-septate, with 

 an oil-drop in each cell, hyaline, 6-10 X 3-4 mic. (pi. 13, f. 3-4). 



On bark of dead alders. 



Type locality: British Columbia. 



Distribution : Known only from type locality. 



Exsiccati: Ellis & Everh. N. Am. Fungi, ^750 (cotype). 



Distinguished by the bright red perithecia which are decidedly 

 barrel-shaped when dry. 



6. Creonectria rubicarpa (Cooke) 

 Nectria rubicarpa Cooke, Grevillea 7: 50. 1878. 



Perithecia cespitose in small, dense clusters, 1-2 mm. in di- 

 ameter, minutely roughened, bright red becoming darker with age, 

 collapsing and becoming deeply pezizoid; asci cylindrical to 

 clavate, 55-60 X 6 mic, 8-spored ; spores i-seriate or partially 

 2-seriate above, elliptical, hyaline, 1 -septate, 10-13 X 4-4-5 m ic. 

 scarcely constricted (pi. 13, f. 11-12). 



