LOPHODERMIUM. 39 



then depressed, rugulose, brownish-black, elliptical, straight, 

 up to 2 mm. long, slit narrow at first, then gaping and ex- 

 posing the pallid brown disc, closing when dry ; asci cla- 

 vate, apex narrowed, 8-spored ; spores needle-shaped, straight 

 or slightly curved, continuous, multiguttulate, hyaline, 

 50-80 x 1 ' 52 p., arranged in a parallel fascicle ; paruphyses 

 filiform, about 2 p. thick, hyaline, apex more or less curled. 



Hysterium arundinaceum, Schrad., Journ. Bot., ii. p. 68, t. 3, 

 fig. 3; Cke., Hdbk., p. 763. 



On sheaths and leaves of various grasses. 



Spermogonia. Perithecia oblong, ends obtuse, depressed, 

 black, readily falling away from the matrix, sulcate ; spores 

 needle-shaped, continuous, hyaline, 1618 p. long. 



Leptostromella hysterioides, var. graminicolum, De Notar., 

 Micr. Ital., iii. f. 6; Sacc., Syll., iii. n. 3513. 



B. On Dicotyledons. 

 * Angiosperms. 



Lophodermium cladophilum. Eehin, Krypt.-Flora, 

 Hyst., p. 42. 



Ascophores scattered or gregarious, up to f mm. long, 

 ^ mm. broad, seated on a brownish spot, arranged at all 

 angles, convex, bursting through a long slit in the cuticle, 

 straight, blackish; asci cylindric-clavate, apex narrowed, 

 8-spored ; spores needle-shaped, arranged in a parallel fas- 

 cicle, almost as long as the ascus, hyaline, continuous, straight, 

 multiguttulate, 40-50 X 1 p- ; paraphyses very slender, 

 almost straight, colourless. 



Hysterium cladophilum, Lev. in Moug. and Nest., Stirp. Vog., 

 n. 1243. 



Sporomega cladophila, Duby, Mem. Hyst., p. 48 ; Cke., 

 Hdbk., p. 764, fig. 360; Sacc., Syll., ii. n. 5846. 



Hysterium Vaccmii, Carm!, Engl. Flora, vol. v. p. 295. 



On dry stems of Vaccinium myrtillus. 



In its early stage of growth it appears like a brown spot, 

 as it swells the cuticle is raised up, and at length splits lon- 

 gitudinally, and for a long time closely covers the two lobes 

 of the perithecium. (Berk.) 



