64 [ ASSEMBLY, 
This species is closely related to R. Armoracie, from which it 
may be distinguished by the whiter mostly margined spots, the . 
shorter hyphz and the catenulate spores. 
CONIOSPORIUM PUNCTOIDEUM, Karst. 
. - 5 : ~ Pe 
Decorticated wood of arbor vite, Thuja occidentalis. Adiron- 
dack mountains. June. 
CLADOSPORIUM APHIDES, Thum. . 
Dead aphides of Phragmites communis. Bergen Swamp. 
June. 
CLADOSPORIUM ASPARAGI, Fr. 
Dead stems of asparagus. Menands. October. 
CLADOSPORIUM BREVIPES, N. sp. 
Spots suborbicular, cinereous ; flocci densely czespitose, short, 
.001 to .0015 inch long, dark olivaceous, almost black in the mass, 
amphigenous, septate; spores terminal, elliptical, .0005 to .0006 
inch long, .0003 to .0004 broad. 
Living leaves of white oak, Quercus alba. Menands. July. 
This species forms minute compact tufts, so distinct and well 
defined that they might easily be mistaken for perithecia. 
CLADOSPORIUM LETIFERUM, N. sp. 
Spots dark brown, irregular, large, often involving the whole 
leaf; tufts epiphyllous, subeffused, olive green, the hyphe very 
short, almost obsolete; spores oblong-pyriform, uniseptate or 
biseptate, slightly constricted at the septa, .0008 to .0012 inch 
long, .0003 broad. 
Living leaves of poplar, Populus tremuloides, Keene. June. 
This fungus often kills the leaves it attacks. When the spores 
have a single septum the two cells are unequal; when they have - 
two septa the middle cell is generally larger than the terminal 
ones. The species differs from C. Astevoma in the shape and 
character of the spores and in its more effused habit. 
CERCOSPORA ACETOSELLZ, Ellis. 
Living leaves of yellow dock, Rumew crispus. Elizabethtown. 
September. 
Our specimens differ slightly from the type and may be designated 
variety maculosa. Spots numerous, small, suborbicular, grayish, 
