704 



ovate-elliptical, 3-5-septate, constricted at the middle septum, one or 

 two of the cells divided by a longitudinal septum, brown, 15-25 x 

 7-8 /Jt. 



On decorticated, exposed wood, also (but less frequently) on dead 

 limbs still covered with the bark; common. 



Var. Gerardi, C. & P., has the perithecia mostly shorter and 

 broader, with the lips more open; var. viticolum, C. & P., has the 

 asci mostly shorter and broader, 75-90 x 15-18 jjl, and the sporidia 

 more or less perfectly biseriate. Cooke makes the sporidia 36 x 12 /*. 

 We find none over 25 x 8 //. H. Rousselii, De Not. (sec. specc. from 

 Gerard, compared by him with authentic specc. from Duby), can not 

 be distinguished in any way from H. Mori, Schw., as represented by 

 specc. in Herb. Schw., nor can we, after a careful examination of many 

 specc. from different localities, during the past ten years, find any 

 reliable characters by which any of the so-called species above quoted 

 can be safely separated. Specimens of H. Rousselii, with elongated 

 perithecia, appear quite distinct from specc. of H. Gerardi, C. & P., 

 with shorter, oblong or elliptical perithecia, but these extremes are 

 connected by a graduated series of forms passing imperceptibly into 

 each other so as to completely fill up the gap ; nor do the sporidia fur- 

 nish any distinctive characters. . At first they are 3-septate, becoming 

 almost always 5-septate, and not seldom 6-7-septate. 



H. variabile, C. & P. Disc, of the U. S. p. 33. 



"Erumpent, then superficial, following the interstices of the 

 woody fibers of the matrix, narrowly elliptical or linear and elongated, 

 straight or flexuous, often parallel, faintly striate -rugose, flattened along 

 the apex, slightly narrowed at each end, lips closely connivent. Asci 

 cylindrical, stipitate. Sporidia uniseriate, very variable in size and 

 form, ovate or elliptical, or broadly clavate, constricted in the middle, 

 5-7-septate, at length with longitudinal divisions, dark brown." 



On old chestnut posts, &c, New York (Peck). 



The foregoing is the diagnosis given by Cke. (1. a). Specc. from 

 Peck have the perithecia crowded, 1-2 mm. long; lips incurved so as 

 to leave a distinct furrow along the apex, often but partially closed, 

 exposing the linear disk. Often the perithecia are marked with a 

 single deep furrow close to and parallel with the lips, but quite as 

 often the furrow is wanting and the flattened apex of the perithecium 

 is faintly transversely rugulose. Asci paraphysate, short-stipitate, 

 p. sp. about 70-75 x 10-12 p.. Sporidia subbiseriate, ovoid, 3-7-sep- 

 tate, somewhat constricted in the middle, about 20 x 8 ju, dark brown, 

 with a partial longitudinal septum running through the central cells. 

 What appears to be the same has been found at Newfield, N. J., on 

 bare, decaying wood of Quercus and Pyrus Malus. 



