12 
Colorado Experiment Station 
‘'ToadstooLvS'’ and ''Mushrooms'' (Fleshy Fungi) 
There are a great many different sorts' of fleshy fungi that are 
called "toadstools” and "mushrooms,” depending upon whether they 
are considered poisonous or edible. Although a number of these 
fungi poison human beings, it is doubtful if stock ever eat them. 
Black Spot of Grasses (Phyllachora graminis) 
In late summer and fall, there appear on the leaves of several 
of our forage grasses, jet black spots, especially noticeable along the 
veins. These spots are very small, scarcely larger than a pin-head. 
Fig. 2.—Four different lichens 
and occur on both surfaces of the leaf, although more abundant on the 
upper. In Colorado, "black spot” is found on several different forage 
grasses. It may be the cause of a stomach inflammation in stock. 
LICHENS 
The most comunon lichens (fig. 2) are those forming crust-like 
coverings on the surface of rocks, or tree trunks, or on the ground. 
Some are raised considerably above the surface upon which they grow. 
