401 



spored. Sporidia oblong-cylindrical, straight or slightly curved, hya- 

 line at first, then brown and 3-septate, 55-70 x 10-15 /x, (mostly 55- 

 65xl2). 



On Acer, Pobinia, Fraxinus, Amelanchier, and Pyrus Mains 

 from New England and Canada to Carolina. 



In the typical form on Acer rubrum, the perithecia scarcely raise 

 the epidermis at all, but in the speec. on Amelanchier and Pyrus 

 Mains (31. Pyri, Otth)? the epidermis is more or less pustuliform- 

 elevated. All the forms here included in M. vomitoria certainly are 

 very closely allied to M. inquinans, (Tode), and might with good 

 reason be considered as mere varieties, or forms of that species. 



M. conspurcata, (Wallr.) 



Sphcsria conspurcata, Wallr. Fl. Crypt. Germ. II, p. 782. 

 Massaria conspurcata, Sacc. Syll. 2888, Cke. Syn. 4043. 

 Fxsicc. Rehin Asc. 882. Ell. & Evrht. N. A. F. 2d Ser. 2613. 



Perithecia scattered or 2-3 together, buried in the inner bark, 

 depressed-globose, about 1 mm. diam., slightly raising and rupturing 

 the epidermis. Asci elongated, clavate-cylindrical, short-stipitate. 

 paraphysate, 150-200 x 20-22 ft, Sporidia subbiseriate, oblong-cylin- 

 drical, slightly "curved or straight, 3-septate, scarcely constricted, .hya- 

 line, becoming brown, 40-60 x 10-12 /i. 



On dead limbs of wild plum, London, Canada (Dearness). 



The specc. in Rehm's Asc. have the asci a little broader and the 

 sporidia 60-70 x 12-14 ju } but do not differ otherwise from these. M 

 vomitoria, B. & C, scarcely differs from this except in having the 

 epidermis less distinctly pustuliform-elevated, and the ostiola smaller 

 and less prominent. 



M. distincta, (Schw.) 



Sphcsria distincta, Schw. Syn. N. Am. 1634. 

 Massaria distincta, Cke. Grev. XVII, p. 92. 



Scattered, covered by the thin epidermis, rather large, buried 

 in the whitened substance of the inner bark. Perithecia black, orbic- 

 ular, depressed, glabrous, persistent in the bark when the epidermis 

 is peeled off, with a large, round opening above. Ostiola perforating 

 the epidermis, short-cylindrical, not prominent, umbilicate. 



Under the epidermis of Sambucus pubens, Bethlehem, Pa. 

 (Schweinitz). 



Sporidia (sec. Cke. in Grev. 1. c), biseriate, 5-septate, brown. 70- 

 80 x 16-18 /i, constricted in the middle and surrounded at first by a 

 hyaline envelope. 

 51 



