49 



acutely elliptical, brown, 7-8-septate and muriform, 20-27 x 12-14 /< 

 (30-40 X 12 ;«, Martin). 



On scales of pine cones, New Jersey. 



CAPNODIUM, Mont. 



Ann. Sci. Nat. Ser. Ill, XI, p. 233. 



Mycelium effused, persistent, forming a black, felt-like coating on 

 living leaves and limbs. Perithecia vertically elongated, sometimes 

 branched, generally fimbriate-lacerate at the vertex. Asci obovate or 

 elongated, 8-spored. Sporidia 4- or more-celled, often with both trans- 

 verse and longitudinal septa, yellow or yellow-brown. 



The members of this genus are but impefectly known; many of 

 the so-called species being only mycelium without any ascigeroi;is peri- 

 thecia, and often without even pycnidial perithecia — sometimes even 

 without conidia. 



A. Asci 2}resent; sporidia muriform. 



C. salicinum, (A. & S.) {Plate 10) 



Dematiurn salicinuM, Alb. & Schw. Consp. p. 368, 

 Fumago vagans, Pers. Myc. Enr. I, p. 9. 

 Cladosporiumfumago, I^k. in Linn, Spec. Plant. 

 Torula fumago, Chevall. Flor. Paris, I, p. 34. 

 Capnodtum salictnum, Mont. 1. t. 

 Capnodium Spheeroideunt, De Lacr. in Rab. F. E. 352. 

 C. Citri, B. & Desm. Molds, p. 11. 

 Exsicc. Rab. F. E. ,352.— Thuemen F. Austr. 169, 435.— Thum. M. U. 1146.— Cke. F. Brit. 

 2d Ser. 291. — Linh. Fungi Hung. 358. — Myc. March. 2231. — Vi2;e Micr. Fungi, 100. 



Mycelium widely effused, covering th6 whole surface of the leaves 

 and young twigs and even the trunk and branches to some extent. 

 Perithecia fleshy, greenish-black, simple or branched, sessile or con- 

 tracted below, thickened above and opening with a subfimbriate or 

 lobed orifice (ostiolum). Asci obovate, sessile, 40-60 x 20-25 /z, 6-8- 

 spored. Sporidia crowded, obovate, obtuse at the ends, 3-4-septate 

 and often with a longitudinal septum, subconstricted at the septa, dark 

 brown, 22-26x9-13 /i. 



In the specimens figured on pi. 10, the sporidia were elliptical, 

 hyaline, 3-septate, one of the cells sometimes divided by a longitudinal 

 septum, 12-15x4-5 fi, crowded in asci about 60 x 10 fi, with abundant 

 paraphyses. Perithecia subovate, with a short, conical ostiolum. 



On Populus tremuloides (limbs) and on Negundo aceroides, 

 Montana (Kelsey). 



Winter, in Die Pilze, gives as probable forms of this species, 

 C. elongatuin, Berk. & Desm., G. expansum, Berk. & Desm., and 

 C. Persoonii, Berk. & Desm., at least as they are represented in 

 7 



