JOURNAL OF MYCOLOGY. 
Vol. IV. MANHATTAN, KANSAS, NOVEMBER 1888. No. 11. 
SYNOPSIS OF THE NORTH AMERICAN SPECIES OF HYPOXYLON AND 
NUMMULARIA. 
BY J. B. ELLIS AND BENJA. M. EVERHART. 
(Continued from page 93.) 
*Hypoxylon obesum, Fr. Nova Symb. p. 129. — On trunks in 
Costa Rica. Oersted. Hard-carbonaceous, bare, black. Stroma 
slightly exceding the short, very thick stipe, of radiate structure 
and cinereous-black within. Perithecia immersed, peripheric, bul- 
late-prominent. Ostiola papillate, surrounded by an elevated, 
orbicular margin. Fries who described this species from a single 
specimen says it is allied to H. annulatum , that it is very hard, 
an inch high, and, at least when mature, quite bare, glabrous and 
shining black. The sterile base or stipe is J an inch high but 
J of a line (“J lin.”) thickf, rugose outside and attenuated be¬ 
low, covered above with a horizontal, slightly convex layer of 
globose, immersed, monostichous, bullate-prominent perithecia, 
like an immarginate pileus an inch across. The bullate projec¬ 
tions of the perithecia are surrounded with a prominent orbicular 
margin and in the middle of this circular area emerge the papilli¬ 
form ostiola. The specimen seen by Fries was old and entirely 
without spores. 
ITypoxylon illitum, Schw. Syn. N. Am, 1205,—Not infrequent 
on standing trunks, especially of Platanus, investing them almost 
completely with its broad, uneven, confluent stromata. Bethlehem, 
Pa. (Schw.) Widely effused, confluent, the layefs often superim¬ 
posed, so as to imitate a sculptured surface, the material of the 
stroma appearing as if smeared on the decaying wood. Surface 
undulate and uneven, at first of a fine olive-green, but finally 
black. Perithecia rather large, slightly prominent, with ostiola 
'■^Accidentally omitted in its proper place next to H. marginatum. 
•{•Apparently a mistake for % inch. 
