338 Peck : New species of fungi 



On branches of silver maple, Acer saccharimim L. River 



Forest, Illinois. April. E. T. & S. A. Harper. 



Perithecia 0.5-I mm. lata, dense gregaria, aliquando leviter 

 caespitosa, irregularia vel subglobosa, erumpentia, atra;"sporae 

 breve fusiformes, utrinque acutae, hyalinae, primo simplices, deinde 

 uniseptatae, 16-20 /ix 4-5 j«. 



Myxosporium acerinum 



Pustules minute, covered by the epidermis, scattered, grayish ; 

 spores oozing out and forming minute whitish dots or masses of 

 unequal size, very large, oblong, often narrowed toward one end, 

 granular within, hyaline, 24-40 ju x 8-12 /i. 



On bark of silver maple, Acer saccharinnni L. River Forest, 



Illinois. April. E. T. & S. A. Harper. 



Acervuli minuti, in cortice nidulantes, sparsi, grisei ; sporae 

 exudantes et massas minutas inaequales albidas formantes, max- 

 imae, oblongae, saepe infra attenuatae, intus granulares, hyalinae, 

 24-40 /i X 8-12/^. 



Stagonospora linearis 



Perithecia pulvinate or hemispheric, 1-I.5 mm. broad, even or 

 rugulose, erumpent, firm, black, whitish within, often yellowish at 

 the base, seriately arranged ; spores straight or slightly curved, 

 subcylindric, subclavate or subfusoid, obtuse at each end, tri- 

 septate, hyaline, 40-60/1 x 5-6/^, supported on slender branching 

 sporophores. 



On dead branches of hickory. River Forest, Illinois. January. 

 E. T. & S. A. Harpen 



Apparently well marked by the long spores and branched 



sporophores. The perithecia in the specimens seen are astomous. 



Perithecia pulvinata hemisphaericave, l-l-S mm. lata, levia 



rugulosave, erumpentia, firma, atra, intus albida, basi flavescentia, 



seriatim disposita ; sporae rectae vel leviter curvae, utrinque ob- 



tusae, triseptatae, subcylindraceae, subclavatae, vel subfusiformes, 



hyalinae, 40-60 /i x 5-6/4, sporophoribus gracilibus ramosis 

 suffultae. 



Bovistella floridensis 



Peridium subglobose, 6-20 mm. broad, flaccid, cortex minutely 

 granular or subpulverulent, brown, soon drying and often forming 

 squamules about the apex, then disappearing and revealing the 

 glabrous whitish inner peridium which opens by a definite circular 

 mouth ; sterile base present but comoact and scantv : caoillitium 



