08 
JOURNAL OF MYCOLOGY 
[VOTj. IV, No 
the epidermis and leaving the blackened surface of the inner bark 
exposed. This growth is analagous to that of Institale acariforme, Fr., 
in connection with Hypoxylon coccineum. Sec. Cooke, in Grev., XIII, p. 
15, this is the same as the preceding species [II. pruinatum). This is not 
improbable, as the only essential difference is in the coarse bristle-like 
teeth surrounding the stroma, a character possibly only accidental, as it 
was not seen on all the specimens, 
b. Stroma externally black. 
Hypoxylon leucocreas. 13. & Rav.— Grev., IV, p. 51. On limbs 
of oak. South Carolina (Ravenel). “Small, about 4 a line across, black, 
papillate from the projection of the perithecia; stroma snow white; asci 
linear; sporidia in a single row, minute, elliptic, brown.” Sporidia (sec. 
Cke., in Grev.) 5 x 21 /■*. 
Hypoxylon exiguum, Cke.—Grev., XI,p.130. On rotten wood, 
Alabama and Carolina, also in Mauritius. “Pulvinate, convex-applan- 
ate, black, oval or discoid (2—3 mm. broad), here and there continent; 
perithecia minute, numerous, papillate ; asci cylindrical; sporidia very 
minute, elliptic, dark, 34 x 2 p. A most distinct species, easily recog¬ 
nized by the exceedingly minute sporidia, which are a little larger in the 
American specimens.” 
Hypoxylon pallidum, E. & E.— On bark of dead oak limbs, Cata¬ 
houla, La. Langlois, No. 1273. Perithecia globose, about one mm. in 
diameter, suberose-coriaceous, connate in tuberculiform clusters, 2—5 
mm. in diameter, of a coffee-brown color, smooth but uneven from the 
slightly projecting flattened apices of the perithecia, which have a small, 
black, papillose ostiolum, surrounded by a light-colored ring; stroma 
scarcely any except as formed by the connate walls of the perithecia; 
asci cylindrical, 150 x 6 P, including the substipitate base, with abundant 
paraphyses; sporidia uniseriate, navicular, opaque, about 12 x 6 p. 
Hypoxylon annitlatum (Scliw.) Fr., in Fr. Elenchus, II, p. 04. 
On dead oak limbs and having about the same range as the preceding 
species ( H . marginatum). Stroma hemispheric-tuberculiform (about 4 
cm. across) or irregularly effused and interruptedly confluent-tubercu- 
lose, purplish-black; perithecia subglobose, monostichous, large (1 mm.), 
from 1—4 of the upper part free, finally annulate-truncate above with the 
black papilliform ostiolum in the center of the truncate disk ; asci nar¬ 
row-cylindrical (p. sp.), 75 x G p or including the slender base 100—112 /'- 
long; sporidia oblong-navicular, uniseriate, brown, mostly 2-nucleate, 
7—9 x 34 with their extremities rather more obtuse than in the pre¬ 
ceding species. Var .B. deprcssa, Fr., 1. c., appears to be the effused form 
above mentioned. This species is not mentioned in Scliw. Syn. N. Am. 
It is readily distinguished from II. marginatum by its larger perithecia, 
much more prominent and sometimes nearly free, and its smaller, pur- 
plisli-black stromata. No. 182 in Rav. F. Am. (in the copies we have 
seen) is II. marginatum. 
