36 



A. aliena, Ell. & Galw. (in Herb.) 



Mycelium crustaceous, forming subelliptical patches, |-1 x |-| cm., 

 on dead areas of the leaf which are separated from the living part by 

 a narrow, reddish border. Perithecia amphigenous, lenticular, sub- 

 confluent, 150-200 fi diam., of cellular-fibrous structure, with a reticu- 

 late-fimbriate margin. Asci at first ovate, finally subelongated, 50- 

 60x20 /i, short-stipitate, 8-spored. Sporidia inordinate, obovate, 

 granular, hyaline, (becoming uniseptate)? 13-15x4-5 it. 



On leaves of pineapple (cult.), Washington, D. C. 



A. (Asterella) Chamsenerii, Rostr. Fungi Gronl. p. 545 (No. 105). 



Spots black, amphigenous or caulicolous, 3-4 mm. across. My- 

 celium subsuperficial, pseudoparenchymatic, margin radiate. Peri- 

 thecia globose-depressed, subastomous, lying in the central part of the 

 mycelium. Asci ovate-cylindrical, 50-60x12-14 ti. Sporidia oblong- 

 clavate, hyaline, unequally uniseptate, the upper cell three times larger 

 than the lower, nucleate, 16-20 x 6-7 t u. 



On partly living stems and leaves of Chamcenerium latifolium, 

 Sukkertoppen, etc., Greenland. 



A. picea, B. & C. Linn. Journ. X, p. 374. 



Perithecia epiphyllous, hemispherical, collapsing, about 150 tt 

 diam., seated 4-8 together on small (1-1 J mm.), orbicular patches of 

 black, crustose mycelium. Asci oblong, 40-50x10-12 /*, without 

 paraphyses. Sporidia biseriate, brown, clavate-oblong, uniseptate and 

 constricted, 10-12 x 3-4 tt. 



On dead leaves of Magnolia. Louisiana (Langlois). 



The patches of mycelium are at first covered by the cuticle of the 

 leaf, which gives them a shining appearance, but when the cuticle is 

 thrown off the mycelium is of a dead black color. 



A. niida, Pk. 38th Pep. N. Y. State Mus. p. 102. 



Mycelium brown, branching, scanty. Perithecia black, at first 

 subglobose, afterwards depressed, thickly clustered near the midrib, 

 mostly hypophyllous, 75-100 fi diam. Asci oblong or subcylindrical. 

 8-spored, 35-40 x 12 ju. Sporidia oblong, hyaline, uniseptate, biseriate, 

 10-12 x 3-4 /i. 



On dead leaves of Abies balsamea, Adirondack Mts., N. Y. 



A. delitescens, E. & M. Am. Nat. 17, p. 1284. (Plate 6) 



Exsicc. EH. N. A. F. No. 1291. 



Mycelium thin, black, epiphyllous, forming small (2-4 mm.), 

 orbicular patches composed of much branched, closely appressed 



