51 

 C. pelliculosuii, B. & Rav. Grov. IV, p. 156, Journ. Myc, I, p. 98. 



Exsicc. Rav. F. Am. 79.— Thum. M, U. 2059.— Ell. N, A. F. 1544. 



Mycelium epiphylloiis, forming a thin, sooty-colored layer on the 

 surface of the leaves and consisting of closely septate, brown, subrect- 

 angularly branched and interwoven threads, 5-8 fi thick, with each 

 cell or joint nucleate, and hearing when well developed, stellately 3-4 

 parted conidia, much like those of Triposporium, nearly hyaline at 

 first, becoming brown, each arm 4-5-septate and nucleate, 7-9 fj. thick 

 at the base and 50-75 fi long, tapering to an obtuse point at the apex. 

 Pycnidial perithecia growing like thick branches from the sides of the 

 prostrate threads, membranaceous, of rather coarse, cellular, structure, 

 oblong or flask-shaped, 75-208 x 30-50 pi, apex subobtuse and subfim- 

 briate, discharging countless, minute, hyaline, oblong sporules 3—4 x 

 1 fi. Sometimes these perithecia are quite globose and formed by the 

 enlargement of one of the component cells of a thread or hypha. There 

 are also produced from the mycelium, cylindrical, brown, multiseptate 

 conidia 70-80 x 6-7 //, like the conidia of Helminthosporium. Ascige- 

 rous, perithecia 100-150 [i diam., with brown, septate appendages 

 like those of an Erysiphe, 15-25 in number, 76-100 /z long. Asci 

 at first oblong, becoming ellipsoidal, and about 40 x 25 fx. Sporidia 

 crowded, broad fusiform, hyaline, uniseptate at first, becoming 3-sep- 

 tate at maturity and 15-22 x 4-7 fi. 



On leaves of Prunus Chicasa, South Carolina (Ravenel), and on 

 leaves of Magnolia glauca, Florida (Martin). The above description 

 is from the Florida specimens. 



The description in Grevillea is very brief, viz. "Threads of the 

 mycelium erect, trifid at the apex after the fashion of Triposporium. 

 shorter than the oblong, constricted perithecia." 



Whether the Carolina and Florida specimens are tlie same we 

 can not positively state. 



C. Schweinitzii, Berk. & Desra. 1. c. 



Velutinous. Flocci (hyphse) subcylindrical. Perithecia subsim- 

 ple, elongated, smooth. Sporidia obovate, cellulose-muriform, scarcely 

 constricted at the septa. 



On leaves of herbs, Pennsylvania. 



C. Asci unknown; sporidia 2-^-septate. 



C. Caroliniense, Berk. & Desm. 1. c. p. 12, fig. 7. 



Scattered, setose, mycelium scanty. Perithecia with elongated, 

 lateral, flask-shaped branches. Sporidia oblong, 2-3-septate. 



