?:LISHA MITCHELL SCIENTIFIC SOCJIETV. 73 



On Quercus dellata, amphitronoiis, mycelium dense, append- 

 ages one to two times diameter of peritliecium, asei three to five, 

 spores four to five, 25-30, Auburn, Ala., October, 1889, 1803; 

 Qaercus rubra f e[)ipiiyllous, appendages one to three times diam- 

 eter perithecium, rough, asci three to five, 50-60 x 70-80, spores 

 two to six, 30. Auburn, Ala., December, 1890, 1798. 



M. CALOCLADOPHOiiA Atkinson. 



Syu. 31. derislssima E. & M. Journal Mycology, Vol. 1, 

 1885, p. 101. 



3L denslsslma E. & M. N. A. F. No. 1538. 



M. densissima Sacc. Sacc. Syll. Addit., p. 2 (in part). 



Hypophyllous, mycelium thin, diffuse, or in orbicular patches, 

 dense. Perithecia scattered, black, rather stout, 100-140, reticu- 

 lations rather distinct. Appendages one to two times diameter 

 of the perithecinm, percurrent, primary branching opposite or 

 nearly so, branches dichotomous, tips incurved, some of thp tips 

 unpaired as in M. Quercma."^ Asci four to six, (^ 



ovate or elliptical, pedicellate, 35-40x65-80. 

 Spores six to eight, 20-25, granular. Through 

 the kindness of Dr. Charles Peck I have had (?^/$. <j)^(^^^ 

 the opportunity of examining specimens of 31. ^^^ ^ (g^ 

 densissima (Schw.) Peck. The specimens are S^r^5^ ^^^\^^ 

 verv distinct from those of 31. densissima E. & 

 M. The appendages are dichotomous throughout and the orbicu- 

 lar patches of the mycelium are very different. The specimens 

 in N. A. F. No. 1538 agree perfectly with those I have col- 

 lected except that the mycelium is in orbicular patches, and more 

 dense. This, however, is a very common variation in a number 

 of species. 



Some might think this species deserving to be the type of a 

 new genus from the character of the appendages, but the dichoto- 

 mous branching of the branches shows its close relationship to 

 3ficrosph(Era. 



On Qaercus aqaatlca, Columbia, S. C, October, 1888, 618; 

 Auburn, Ala., December, 1890, 1804. 



(^ 



*This is not a peculiarity of the tips of speeimens on oak. I liave noticed it in M. 

 Alni on Syringa. 



