401 



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

 line at first, then In-own and 3-septate. .">.~)-70 x 10-15 a. (mostly 55- 



On Acer, Rob'uiia. Fraxinus. Amelanckier, and Pyrus 

 from Xew England and Canada to Carolina. 



In the typical form on Acer rubrmn. the perithecia scarcely raise 

 the epidermis at all. lut in the specr. on Amelanchier and Pyrus 

 Mains (M.Pyrt. Otth)? the epidermis is more or less pustuliform- 

 elevated. All the forms here included in M. vomit or ia certainly arc 

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

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



M. conspurcata, (Wallr.) 



Sph&ria conspurcata, Wallr. Fl. Cn-pt. Germ. II, p. 782. 

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

 Exsicc. Rehm 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, cliarn., slightly raising and rupturing 

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

 paraphysate, l.")0-2(M> x 20-22 ft. Sporidia sul)biseriate. ol (long-cylin- 

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

 line, becoming brown. 40-60 x 10-12 JJL. 



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



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

 -poridia 60-70 x 12-14 /, but do not differ otherwise from these. M. 

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

 epidermis less distinctly pustuliform-elevated, and tlie ostiola smaller 

 and less prominent. 



31. distincta, (Schw.) 



Sph&ria distincta, Schw. Syn. N. Am. 1634. 

 Massarta 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 epidermi- 

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

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



Under the epidermis of SambitCK* puben*. Bethlehem. Pa, 

 ; Schweinitz). 



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

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

 hyaline envelope. 

 51 



