ELISIIA MITCHELL SCIENTIFIC SOCIETY. <]!) 



specimens from elm these appeiulaj^es are quite equal to one-half" 

 the diameter of the peritheeium; on specimens from oak they 

 are quite short and apt to be overlooked. 



PODOSPH.ERA (D C.) D By. 



Peritheeium containiui^ one ascus; appendages dichotomously 

 branched, free from the mycelium. 



P. BIUNCINATA C. (S: P. 



Epiphyllous; mycelium abundant, thin, diffuse. Perithecia 

 black, numerous, scattered, small, 65-70, reticulations rather 

 large, distinct. Appendages five to ten, three to five times the 

 diameter of the peritheeium, hyaline, faintly colored at the base, 

 rough, once dichotomous, tips rather long, strongly divergent, 

 sliofhtlv recurved. Asci jj^lobose or oval, sometimes with a short 

 broad pedicel, 45-50x50-55. Spores eight, 15-18. 



On Hamamells Virginiana, Blowing Rock, Watauga county, 

 N. C, August 24, 1888, 613. 



P. OXYACANTH.f: (D C.) D By. 



Amphigenous; mycelium thin, not very persistent. Perithecia 

 numerous, scattered, small, 65-70, dark brown. Appendages 

 eight to twelve, about twice the diameter of the peritheeium, 

 dark brown for over half their length, three to four times dichoto- 

 mously branched, branching compact, tips incurved. Asci sub- 

 orbicular, 55x60, thick-walled. Spores eight. 



On Cratcegus punctata, Blowing Rock, Watauga county, N. 

 C, August, 1889, 663. 



MICROSPH^RA Lfiv. 



Peritheeium containing several asci, appendages dichotomously 

 branched, or percurrent and then the primary branching oppo- 

 site, tips of the branches dichotomous. 



M. SEMITOSTA B. & C. (see Figs. 12, 13 and 14, PI. I). 



Hypophyllous; mycelium thin, evanescent. Perithecia scat- 

 tered, usually numerous, small, black, about 80, reticulations 

 obscure in age. Appendages rough, five to ten, about the length 

 2 



