Apr., May, 1888.] 
HYPOXYLON AND NUMMULARIA. 
41 
Hypoxylon aegillaceum (Pers ^—Splicvria argillacea, Pers. Syn., 
p. 10. On trunks of ash ; more rarely on beech and birch. Bethlehem, 
Pa. (Schw.); Canada (Maclagan); on beech, N. Y. (Peck). Stromata 
erumpent-superficial, subglobose, solitary, rarely connate, clay color, be¬ 
coming black within ; perithecia in a single layer (monostichous), rarely 
irregularly polystichous, ovate, small, crowded, somewhat prominent, 
minutely mammillose; conidial layer white, becoming stag color or clay 
color ; conidia small, ovate, hyaline on long, sparingly branched, septate 
sterigmata; asci cylindrical, with very long, slender pedicels, spore¬ 
bearing part 140 x 16 /j; paraphyses simple, thread-like, longer than the 
asci ; sporidia uniseriate, broad ovate, elliptical or subinequilateral, 
obtuse, opaque, 18—22x9—10 (22—24x 10—12 1 J - Sacc. in Syll.) This 
species, of which we have seen no specimens except those sent from 
England by Dr. Plowright, seems to be easily recognized by its clay- 
colored stroma and large sporidia. 
Hypoxylon notatum, B. & C — Grev. IV, p. 50. On bark of Celtis. 
Carolina (Ravenel); on Viburnum , Pennsylvania (Michener). ‘•Perithe¬ 
cia few, rather large, crowded into a little pulvinate mass clothed with 
rubiginous powder; ostiola at length prominent, truncate, with a central 
perforation. The sporidia, which are shortly cymbseform, vary a little in 
size.” 
In the specimens in Rav. Fungi Car. Exsicc., IV, No. 36 (the only 
ones we have seen) the little pulvinate erumpent masses (stromata) are 
1—2 mm. across, each containing 2—6 perithecia having thick coriaceous 
walls and about I mm. in diameter. The asci are surrounded by abun¬ 
dant paraphyses and have the spore-bearing part 55—60 x 8 ! J -. Sporidia 
uniseriate, short cymbiform, opaque, 12—14 x 8 /-*, as noted by Cke. in 
Grevillea XI, p. 123. The interior of the stroma shows a slight yellowish 
tint, like that of H. Sassafras , Schw., but not as distinct. The substance 
of the stroma is quite soft, almost carnose. 
Hypoxylon fuscum (Pers.)—Syn., p. 12. On dead alder, birch, 
hazel, beech and other deciduous trees. Common throughout the United 
States and Canada. Stroma erumpent-superficial, solitary or subconnate, 
depressed-pulvinate, or hemispherical, generally 1—3 mm. diameter, dark 
purplish-red, finally black, somewhat uneven from the slightly project¬ 
ing, small, closely packed, irregularly monostichous; subglobose perithecia 
with minute mammiliform ostiola; conidia very minute, borne singly at the 
extremities of short, sparingly branched sterigmata; asci cylindrical on 
long pedicels, spore-bearing part 80—90 x 7—8 /-*; paraphyses filiform; 
sporidia uniseriate, subinequilateral-elliptical, opaque and, in the speci¬ 
mens examined, 11—14 x 5—6 /'- (12—16 x 5—7 />-, Sacc.) 
Hypoxylon botrys. Nitscli.—Pyr. Germ., p. 34. On bark of dead 
willow tree, Pointe a’ la Hache, La. Rev. A. B. Langlois, No. 376. Stro¬ 
mata erumpent, aggregated and subconnate or oftener tuberculiform, 
1—2 mm. in diameter, consisting of simple aggregations of perithecia 
