401 



spoi'ed. Sporidia oblong-cylindrieal, straio;lit or slightly curved, hya- 

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

 65x12;/). 



On Acer, Robinia, Fraxinus, Amelanchier, and Pyrus Malus 

 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 specc. on AmelancMer and Pyrus 

 Malus {M. Pyri, Otth)? the epidermis is more or less pustuliform- 

 elevated. All the foi'ms here included in Ml 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. conspurckta, (Wallr.) 



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

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

 Exsicc. Rehm Asc. 882.— Ell. & Evrht. N. A. P. 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, 

 caraphysate, 150-200 x 20-22 /x. Sporidia subbiseriate, oblong-cylin- 

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

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



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 //, but do not dififer otherwise from these. M. 

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

 epidermis less distinctly pustuliform-elevated, and the ostiola smallo- 

 and less prominent. 



M. distincta, (Schw.) 



Spharia 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 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 fi, constricted in the middle and surrounded at first by a 

 hyaline envelope. 

 51 



