445 



D. tortuosa, (Fr.) 



Sphtzria tortuosa, Fr. S. M. II, p. 395. 



Valsa tortuosa, Cke. Valsei of the U. S. 125, Cke. Syn. 2033. 

 Diapor the tortuosa, Sacc. Syll. 2441. 



Peritbecia globose, glabrous, smooth, circinate-crowded in the 

 substance of the inner bark, and covered by a subprominent, cortical 

 pustule. Ostiola converging- within the pustule, then fasciculate-erum- 

 pent, short, subdivergent, nearly smooth or elongated, deflexed, sub- 

 nodose, with the habit of Calosphceria pulchella. 



In Schw. Syn. N. Am. No. 1450, this species is said to have been 

 found in New Jersey, on a pine limb infested with Peridermium Pini; 

 very rare. 



The spec, in Herb* Schw. labeled Sphceria tortuosa, Fr., is the 

 Caliciopsis pinea, Pk., which is certainly not the Sphceria tortuosa, 

 Fr. Whether Schweinitz was mistaken in his determination, or the 

 error has resulted from some confusion of labels, we can not say, but 

 incline to the former alternative, as the name (in Schweinitz' hand- 

 writing apparently) is written on a piece of paper to which the speci- 

 men is glued. 



B. Perithelia gregarious, more or less sunk in the wood, which is 



often blackened on the surface and circumscribed by 



a black line within [Euporthe). 



* On dicotyledonous plants. 



(a) Arboricolce. 



D. concrescens, (Schw.) 



Sphceria concrescens, Schw. Syn. N. Am. 1301. 

 Diaporthe concrescens, Cke. Grew XIII, p. 38. 



Covered by a kind of black crust formed from the bark, trans- 

 versely erumpent, orbicular or elliptical, with the disk concave, sur- 

 rounded by the substel late-ruptured epidermis and an elevated margin. 

 1-1 1 cm. long. In this crust the perithecia are partly sunk, globose- 

 depressed, minute, attenuated above into a cylindrical ostiolum rather 

 thick and somewhat exserted. Perithecia with a light-colored 

 nucleus, at length changing their form and becoming conic-cylindrical. 

 Sporidia (sec. Cke. 1. c.) fusiform, 4-nucleate, then uniseptnte, 12 p. 

 long. 



On dead stems of Ribes aurcum (cult.), Bethlehem, Pa. (Schw.). 



Allied to D. recondita, Schw., but differs in its longer sporidia. 

 as well as in some other characters. Considered by Schweinitz as a 

 good species and quite distinct. 



