721 



L. lineare, (Pk.) 



Rhytisma lineare, Pk. 25th Rep. p. 100, pi. 1, figs. 24-26. 



Hypoderma lineare, Thum. in Diag. M. U. Cent. X-XII, p. 12, and Sacc. Syll. 5788. 

 Exsicc. Thum. M. U. 1073. 



Hypophyllous, linear, here and there interrupted or constricted, 

 forming a black strip along the midrib, often extending the entire 

 length of the leaf; lips thin, closed at first, then open, exposing the 

 pallid disk. Asci ventricose-clavate, 100-110x35-40 //, aparaphysate, 

 8-spored. Sporidia lying in irregular order, 50-70 pt long, didymous, 

 consisting of two oblong, granular-hyaline parts 25-30 x 4-5 /i joined 

 end to end by a slender neck. 



On leaves of Pinus Strobus, Guilderland, Greenbush and Sand- 

 lake, N. Y. (Peck). 



The measurements of asci and sporidia are from the spec, in 

 Thiim. Mycotheca. 



L. pinastri, (Schrad.) 



Hysterium pinastri, Schrad. Journ. Bot. II, p. 69, tab. 3, fig. 4. 

 Aporia obsdnyf, Duby , Hyst. p. 51. 

 Lophodermium pinastri, Chev. Flore Paris. I, p. 430. 

 Exsicc. Fckl. F. Rh. 734. Kze. F. Sel. 371. Rab. F. E. 1443, 1922, 2022. Rehm Asc. 127. 

 Sydow, M. March. 93. Thum. F. Austr. 505, 871, 1059. Thum. M. U. 292. 



Perithecia scattered on pale spots mostly limited by a black line, 

 innate-erumpent, oblong-elliptical, subobtuse, simple, 'finally shining- 

 black, |-2| x J-l mm., with a narrow cleft, the lips (sometimes yel- 

 lowish) slightly separated, revealing the pale disk. Asci clavate, 

 obtusely pointed above, 8-spored, 90-150x10-14 //, with filiform, 

 nearly straight paraphyses 2-2 J p. thick and hyaline. Sporidia straight 

 or a little bent, continuous, multinucleate, hyaline, 75-120 xl|-2 yt. 

 Spermogonium (Leptostroma pinastri, Desm.) with hyaline, cylin- 

 drical sporules 6-8 x ^-1 fi. 



On the upper side of leaves of various species of pine trees, com- 

 mon everywhere. 



CLITHRIS, Fr. 



Syst. Mycol. II, p. 186. 



Perithecia soft-coriaceous, elliptical, flexuous or sublinear, becom- 

 ing black, subcutaneous, then erumpent, dehiscing with a longitudinal 

 fissure, soon broadly open, but for a long time covered by the epider- 

 mis. Asci elongated, paraphysate, 8-spored. Sporidia fasciculate, 

 filiform, hyaline, about as long as the asci, continuous at first, finally 

 multiseptate. Differs from Lophodermium, in its more widely dehis- 

 cent perithecia which are also of a softer texture. 

 91 



