715 



The perithecia are rather smaller than in L. melalcvcum. and though 

 they have the white-margined lip? of that species, the fructification i* 

 exactly that of L. macnhtre. 



V 



L. melaleiiciini, (Fr.) 



Hysterium melaleucum, Fr. Obs. Mycol. I, p. 192, tab. II, fig, i. 

 Lophodermium melaleucum, De Not. Pir. Istr. p. 40. 

 Kxsicc. Fckl. F. Rh. 736, Sacc. M. V. 1478. 



Perithecia on pale or whitish, subdeterminate spots, innate, con- 

 vex-erumpent, elliptical or suborbicular, obtuse, mostly simple, straight, 

 black, 1 x \-\ mm., at first depressed, then carinate, at length opening 

 by a lineai 1 crevice and exposing the white (sometimes yellow or 

 greenish) margin of the lips. Asci cylindric-clavate, obtusely pointed 

 at the apex, stipitate. 70-75 x9 <>.. with filiform paraphyses, 2 // thick 

 and subundulate-bent. S])oridia filiform, straight, continuous, hyaline, 

 50-55 x 2 p, lying parallel, 8 in an ascus. 



On living leaves of Rhododendron Catawbiense, Roan Moun- 

 tain, North Carolina (Scribner). 



This agrees so well with specc. and diagnosis of L. melaleucum, 



that we refer it here without hesitation. The lips when first opened 

 have a yellow margin, and it cannot therefore be the typical form. 



L. sphserioides, (A. & S.) 



Hysterium sph&rioides, A. & S. Conspect. Fung. Nisk. p. 57, tab. X, fig. 3. 

 Lophodermium spfuerioides, Duby, Hyst. p. 44. 



Perithecia scattered on paler spots, innate, hemispherical, about 

 \ mm. diarn., brownish-black, pierced above with a nearly round open- 

 ing or with a narrow, slightly white-margined cleft extending nearly 

 across the apex. Asci clavate, stipitate, 60-65 x 7-8 /^, with filiform 

 paraphyses longer than the asci and mostly recurved or hooked at the 

 tips. Sporidia 8 in an ascus, filiform, lying parallel, hyaline, about 

 35 x 1| IJL. 



On dead leaves of Ledum palustre. Vermilion Lake. Minnesota 

 (Holway), New York State (Peck). 



The diagnosis is from the Minnesota specimens. 



L. tiiniidum, (Fr.) 



Hysterium tumidum, Fr. S. M. II, p. 591. 

 Coccomyces tumida, De Not. Giorn. Bot. Ital. II, p. 38. 

 Lophodei miiun tumidum, Rehni, Die Pilze, III, p. 40. 

 Exsicc. Fckl. F. Rh. 746. Rehm Asc. 519. Rornell, Fungi Scand. 84. 



Perithecia scattered on pale spots, innate, swollen-erumpent. ellip- 

 tical, subacute at the ends, shining-black, the sharp, slightly open lips 

 leaving only a narrow cleft between them, and partially exposing the 



