G6 
journal of mycology. 
tV OL. IV, No. 7, 
SYNOPSIS OF THE NORTH AMERICAN 
SPECIES OF IIYPOXYLON AND N U MM II LA R I A. 
BY J. B. ELLIS AND B. M. EVERHART. 
(Continued from page 44.) 
III. Clitoxylon. Stroma pulvinate, more or less convex, but not 
effused. 
a. Stroma externally colored, not black. 
IIypoxylon xanthocreas, B. & C.—Grev. IV, p. 51. New En¬ 
gland (Sprague); ( H. Peckiayium , Sacc. Syll., I, p. 360). On Alnus, N. Y. 
(Peck). “At first distinct, pulvinate, then by confluence forming a mass 
half an inch broad, black, papillate from the projection of the minute 
perithecia; asci linear; sporidia uniseriate, elliptic,. 0003 of an inch long” 
(10 x 5 Cke.) 
Prof. Peck, in 31st Rep., p. 49, says : “ Our specimens (on prostrate 
dead alders) agree with those received from Dr. Curtis under this name, 
but they do not agree with the description of the species as published in 
Grevillea. In our specimens the young plant is covered with a compact 
yellow conidiiferous stratum bearing elliptical conidia .00016' — .0002' 
long. As the stroma increases in size it becomes naked above and of a 
purple-brown or chestnut color which contrasts beautifully with the 
yellow margin. When old it becomes darker, but I have not seen it black 
as described. The surface is generally irregular or uneven. The stroma 
is whitish or pallid within, but near the surface it is yellow. The spores 
vary from .000-1'—.0006' in length” (10—15 m). 
The specimens of this species in Rav. Car. ,V, No. 57, have the stroma 
3—4 mm. broad, brown above with the margin and inside yellow ; asci 
(p. sp.) about 60 x 6 /*, with a slender stipitate base of about the same 
length; sporidia uniseriate, elliptical, pale brown, 7—9 x 3—4 t >There 
does not seem to be much doubt that the specimens found by Peck in 
New York are the genuine H. xanthocreas. 
IIypoxylon epipiilceum, B. & C.—Grev., IV, p. 52. On Magnolia 
glauca. Carolina (Ravenel), N. J. (Ellis). The early conidial stage con¬ 
sists of small (1—2 mm.), thin patches of brick-red tomentum consisting 
of erect hyphse suboppositely branched above and minutely roughened, 
bearing ovate, hyaline, 3—34 x 21 !>■ conidia. In the midst of these 
conidial patches soon appear small clusters of 3—12 perithecia £—1 mm. 
in diameter and either scattered or singly, more or less connate, the 
different groups or clusters more or less confluent but not continuous, 
covered at first with the brick-red conidial layer, then bare and black; 
asci cylindrical, 80 x 44 a (spore-bearing part about 60 ft long); sporidia 
uniseriate, navicular, deep brown, 7—8 x 3 /l The perithecia have a 
distinct papilliform ostiolum. 
