49 



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

 (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, sometime* 

 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 ascigerous peri- 

 thecia, and often without even pycnidial perithecia sometimes even 

 without conidia. 



A. Asci present; sporidia murifomu 

 C. salicinum, (A. & S.) 



(Plate 10) 



Detnatium salicinum, Alb. & Schw. Consp. p. 368. 

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

 Cladosporium fumago, I,k. in L,inn. Spec. Plant. 

 Tom la fumago, Chevall. Flor. Paris, I, p. 34. 

 Capnodium salicinum, Mont. 1. c. 



Capnodium Spfueroideum, De Lacr. in Rab. F. F,. 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. I^inh, Fungi Hung. 358. Myc. March. 2231. Vize Micr. Fungi, 100. 



Mycelium widely effused, covering the 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 20-2o //, 6-8- 

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

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

 brown, 22-26 x 9-13 p. 



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 /*, crowded in asci about 60 x 10 //, with abundant 

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



On Populus tremuloides (limbs) and on Negundo acero 

 Montana (Kelsey). 



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

 C. elongatum, Berk. & Desm., C expansion, Berk. & Desm.. and 

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

 7 



