Jut,y, 1888, J 
IIVPOXYLON AND NUMMULALtlA 
67 
IIypoxylon stjborbictjlare, Pk., 30th Hep., p. 63.—On bark of 
Acer saccharinum , New York (Peck). “Stroma thin, flattened, erum- 
pent, surrounded by the ruptured epidermis, growing from the inner 
bark, purplish-brown, then black, the surface slightly uneven as if 
areolate-rirnose ; perithecia monostichous, subglobose; ostiola sunken, 
perforate, sometimes whitish; spores unequally elliptical, colored, .0004' 
—.0005' long.’ 1 Mr. Peck considers this an ally of H. Lasckii , Nits., but 
the thin stroma would remove it from this section. Placed by Cooke in 
Nummular ia. 
IIypoxylon Morsei, B. & C.—Grev. IV, p. 51. On Alnus. Maine 
(Blake); New Hampshire (Mrs. Harrison); New York (Peck). On Pyrus 
malus , Carpinus and Betula. Iowa (Holway) [Fuckelia Morsei , Cke., 
Grev., XIII, p. 103]. Stroma erumpent, orbicular, 3—5 mm. in diameter, 
closely embraced by the ruptured epidermis, flattened above, brownish- 
black and papillose from the prominent ostiola, surrounded by a black 
circumscribing line; perithecia large (about one mm.), submonostichous, 
mostly only slightly prominent, 4—15 in a stroma; asci linear-cylindrical, 
110—120 x 12 !>■; sporidia uniseriate, oblong-elliptical, brown, 1—2-nucle- 
ate, 17—22 x 8—10 The Iowa specimens on birch have the stroma 
elliptical and larger (1 x £ cm.) and the perithecia have a tendency to 
crack away from each other and separate. Sec. Cke., in Grev., 1L JBlakei , 
15. & O., is not distinct from this. 
IIypoxylon decorticatum, Sch.— Syn. N. Am., No. 1179. On 
wood and bark, Bethlehem, Pa. (Schw.), New England (Torrey). Sub- 
pulvinate, flattened when on the wood, less so on the bark, surface rusty 
gray and densely covered with rough, sphseriseform tubercles resembling 
ostiola so as to appear roughened with black granules ; perithecia peri¬ 
pheric in several layers, ovate-globose, immersed in the dark rust-colored 
stroma; pulvinuli subrotund or irregular, about 5 mm. across, often con¬ 
fluent; sporidia (sec. Cke., in Grev., XI, p. 123) 12—14 x 4 p. 
IIypoxylon pruinatum (Klotszch).— SphcBria pruinata , Kl., in 
Linnaia, 1833, p. 489; Posellinia pruinata (Kl.) Sacc., Syll., I, p. 259. Peri¬ 
thecia globose, effused, concrescent, prominent, white-pruinose, black 
within; ostiola prominent, black; asci broad-cylindrical,briefly stipitato- 
spored; sporidia uniseriate, ellipsoid, 1—4-nucleate, 25 !>■ long. On the 
bark of trees. North America (Dr. Kichadson). 
IIypoxylon Holwayi, Ell., in Am. Nat., February, 1883, p. 193.— 
On dead Pop ulus, Iowa, July (Holway). Stroma i—i cm. in diameter, 
rather thin, orbicular, black within, surface covered with a white-prui¬ 
nose coat except the projecting, acutely papillose black ostiola; perithecia 
in a single layer, 20—30 in each stroma; asci cylindrical; sporidia uniser¬ 
iate, oblong, brown, 1—2-nucleate, 22—27 x 11 /•*, resembling the spores of 
a Splicer opsis. Surrounding the stroma and standing out obliquely like a 
coarse fringe are short, coarse, black bristle-like teeth like the teeth of a 
Hydmim or Irpex. This curious growth also arises from the surface of 
the inner bark for some distance around the stroma, soon throwing off 
