Reed—Infection Experiments. 
153 
Poa trivialis. 
The Rough-stalked meadow grass, like Wood meadow grass, 
is well adapted for shaded places. It is a spreading, thickly 
matting, stoloniferous species. The young seedlings are nar¬ 
rower leaved than those of the other Poas considered and lighter 
green in color. They resemble the Kentucky blue grass, how¬ 
ever, quite closely. 
Eight experiments were made in wTiich spores from blue 
grass were sown upon the seedlings of P. trivialis. A slight in¬ 
fection occurred in only two experiments. In each of the ex¬ 
periments 103 a and 107 a one patch of mycelium with conidia 
was present on an inoculated seedling. These patches had dis¬ 
appeared when the seedlings were examined a second time a 
few days later. In these two experiments the seedlings of blue 
grass inoculated with spores from blue grass and placed under 
the same bell jars with Poa trivialis, became only slightly in¬ 
fected. 
I 
Poa compressa. 
Canada blue grass is not reported so far as 1 can find as a 
host of E. graminis. As seen from the table eight experiments 
were made in which seedlings of this grass were inoculated with 
spores from Kentucky blue grass. It is a very hardy grass, 
growing on poor and dry soils. It has creeping rootstalks, 
forming a close and durable turf. It is distinguished from the 
Kentucky Blue Grass by its flattened wiry stems and by its 
decidedly bluer color. 
None of the seedlings inoculated with spores from the blue 
grass became infected except in two experiments. In one of 
these, 107 b, a small patch of mycelium bearing conidia was 
present on one inoculated leaf. In experiment 108 b there was 
no visible infection when first examined seven days after inocu¬ 
lation. When examined a week later two small infected areas 
were present on one inoculated seedling. In the first of these 
two experiments, the seedlings of blue grass inoculated with 
spores from the same host and placed under the bell jar with P. 
