42 NORTH AMERICAN SORDARIACEAE 
4. Texture of perithecia. 
5. Ascus with apical structure which colors brightly with 
iodine. 
6. Spores with hyaline envelopes. 
7. Spores with lateral germ-slit. 
Poronia differs from Zypocopra in having a stipitate stroma 
and in developing conidia. Concerning the latter it may be said 
that it is of minor importance inasmuch as it is not definitely 
known whether Hyfocopra produces conidia or not, and it is well 
known that although some species of the Sordariaceae produce 
conidia, others never do. The apical body of the ascus is a very 
characteristic structure and occurs according to my observations 
very commonly in the Xy/artaceae. 
Podosordaria Mexicana EM. & Holway, which would naturally 
be looked for here, is a Poronia pure and simple. 
I. SORDARIA Ces. & DeNot. Comment. Soc. Crit. Ital. I: 
225. 1861. Ellis & Everhart, N. Am. Pyren. 126. 1892. 
Winter ; Rabenhorst, Krypt.-Flora, 1? : 165. 1887. 
Hypocopra Fuckel, Symbol. Mycol. 240. 1869. Saccardo, 
Syll. Fung. 1: 240. 1882. 
Perithecia scattered or aggregated, superficial or sunken, mem- 
branous or coriaceous, dark and opaque. Asci containing an 
apical perforation and stretching at maturity. Spores one-celled, 
usually dark-brown in color and surrounded by a gelatinous 
hyaline fugacious covering. 
Key to the Species 
Perithecia not hairy or bristly. 
Spores dark-colored. 
Perithecia coriaceous. I. S. bombardioiaes. 
Perithecia membranac 
Spores small (5 K 8 rA subglobose, 2. pe minima. 
pores cymbiform hippica. 
سو‎ ellipsoid, SCH (15-18 X 25-34), rounded 4 D ends. 
crospora. 
Spores ellipsoid, smaller (11-13 X 16-23 ۸ و(‎ sel sien below 
رک‎ 
Spores obovate, acutely rounded below. 3 S, hum 
pores hyaline. جس تل‎ 
5 
Perithecia hairy or bristly. 
Asci 8-spored. 
Beak long and hairy. 
Spores with apiculum at each end. 8. S. Montanensis. 
