51 

 ('. pellicnlosun, B. & Rav. (Irev. IV, p. 156. Journ. Mye. I. p. 98. 



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



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

 sin-face of the leaves and consisting of closely septate, brown, subrect- 

 anu'iilarlv branched and interwoven threads, 5-8 u thick, with each 



o * / 



cell or joint nucleate, and bearing 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 p. thick 

 at the base and 50-75 /JL long. tapering to an obtuse point at the apex. 

 Pycnidial peritliecia growing like thick branches from the sides of the 

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

 oblong or flask-shaped. 75-208x30-50 it., apex subobtuse and subfim- 

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

 1 p. Sometimes these peritliecia 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 jETelminthosporium. Ascige- 

 rous, peritliecia 100-150 u. diam.. with brown, septate appendages 

 like those of an Erysiphe, 15-25 in number, 75-100 // long. Asci 

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

 crowded. l>road fusiibrm. hyaline, uniseptate at first, becoming 3-se]>- 

 rate at maturity and 15-'2_x4-7 a. 



%> i 



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

 leaves of Magnolia <jl<inc<i. 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 peritliecia." 



Whether the Carolina and Florida specimens are the same we 

 can not positively state. 



C. Schwehiitzii, Berk. & Desm. 1. c. 



Velutinous. Flocci (hyphae) subcylindrical. Peritliecia subsim- 

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

 constricted at the septa. 



On leaves of herb?, Pennsylvania. 



> 



C. A#ci unknown; sporidia %-5-septate. 

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

 Scattered, setose, mycelium scanty. Perithecia with elongated, 

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



