445 

 D. tortuosa, (Fr.) 



Sphczria tortuosa, Fr. S. M. ir, p. 395. 



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



Diaporthe tortuosa, Sacc, Syll. 2441. 



Perithecia globose, glabrous, smootli, circinate-crowded in the 

 substance of the inner bai'k, and covered by a subpronainent, cortical 

 pustule. Ostiola convei-ging within the pustule, then fasciculate-erum- 

 pent, short, subdivergent, nearly smooth oj' elongated, deflexed, sub- 

 nodose, with the habit of Galosphceria 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 Peridcrmium Pint; 

 verj- 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 deternnnatiou, 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. Perithecia gregarious, more or less sunk in the wood, which is 



often blacTcened on the surface and circumscribed by 



a black line within {Euporthe). 



* On dicotyledonous plants. 



(a) Arboricolce. 



D. concrescens, (Schw.) 



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

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



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

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

 rounded by the substellate-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 lightcoloi-ed 

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

 Sporidia (sec. Cke. 1. c.) fusiform, 4-nucleate, then uniseptate, 12 fi 

 long 



On dead stems of Uihcs aureum (cult.), Bethlehem, Pa. (Schw.). 



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

 as well as in some other chai'acters. Considered by Schweinitz as a 

 good species and quite distinct. 



