DmEUospoRiu:^! Laxgloisii, E. & M.—On living leaves of Dianthem 
humilis, Louisiana, Xovernber, 1885. Rev. A. B. Langlois, No. 73. Peri- 
tliecia gregarious, depressed-spherical, rough, black, subastomous, 
111^—liiO /' in diam., seated on a thin mycelium of brown, branching 
threads, forming small, dark-colored patches, thickly scattered over the 
upper surface of the leaf and giving it a mottled appearance; asci 
subsessile, oblong, often inequilateral or bulging on one side, 25—30 x 7—9 
without paraphyses; sporidia biseriate, clavate-oblong, yellowish- 
brown, 4-nucleate, 1-septate and slightly constricted at the septum, 9—10 
X 34—4 l>-. Some of the perithecia contain oblong-cylindrical, 2-nucleate, 
subhyaline, 7—8 x 2 !•■ stylospores. The perithecia have a distinctly 
radiate-cellulose structure. 
Dimerosporium Ni]vrB 0 su]M, E. & M.— On living stems of Smilax, 
near Jacksonville, Florida, February, 1886. W. W. Calkins, No. 555. 
Mycelium composed of prostrate, brown, branching, septate threads, 
with short, erect branches, bearing oblong-clavate, 3—4-septate, brown 
conidia, 35—40 x 6—8 and longer (70—80 x 5—6 /^-), erect, straight, 
septate, opaque, sterile branches, the whole forming orbicular, velutinous, 
black patches, ^—1 cm. across, mostly soon confluent, extending along 
and enveloping the stem for five cm. or more. The mycelium finally 
disappears, leaving a black, smooth, shining surface ; perithecia collected 
mostly in the center of the spots, erumpent, conical, black, carbonaceo- 
membranaceous, rough, about one third millim. broad and high, some¬ 
times imperfectly sulcate-striate around the prominent, mamose ostiolum; 
asci subcylindrical, 70—80 x 10—14 y-, nearly sessile and surrounded with 
abundant filiform paraphyses and containing eight biseriate, oblong- 
cylindrical, 16—20 X 5—6 M sporidia, yellowish and 2-nucleate at first, 
finally brown and uniseptate and more or less constricted at the septum. 
The species will have to go in Dimerosporium, if that genus is to be 
retained, but its natural affinity is more with Meliola. Mystrosporium 
aterrimum, B. & C., appears to be the conidial stage. 
Stagonospora VIRENS, E. & M.—On leaves of Quercus virens, Green 
Cove Springs, Florida, Feliruary, 1885. Dr. Martin. Perithecia black, 
subglobose, clustered or scattered, hypophyllous, 130—160 ;>■ in diam.; 
spores hyaline, ovate, ends acute, uniseptate, 15—16 x 4—6 y. 
Phvllosticta gossypina, E. & M.—On fading leaves of the cotton 
plant. Com., Prof. F. L. Scribner. Spots light rusty brown to pallid or 
nearly white, irregular, 3—5 millim. broad, surrounded by a broad reddish- 
purple margin, often discoloring most of the leaf; perithecia black, 
subglobose. collapsing, membranaceous, innate-erumpent, slightly prom¬ 
inent, epiphyllous, scattered, few in a spot, 65—95 !>■ in diam.; sporules 
hyaline, oval, ends obtuse, 24—34 x 14—24 
PnvLLosTKjTA ARRUTiFOLiA, E. & M.—Oil living leaves of Fyrus 
arhutifoUa, Newlield, N. J.. Sept. 5th, 1885. Spots epiphyllous, small 
(] millim. or less), white, scarcely showing at all on the under side 
of the leaf; perithecia mostly a single one in the center of the spot, 
sidiastomous, emergent, black, 70—8 y in diam.; sporules subglobose, 
hyaline, 6—s y in the longest diam. 
