Somk Colorado Mushrooms 
23 
No. 18. The oyster mushroom (Pleurotus sapidus). A small cluster 
from a cottonwood stump. 
♦ 
Elm Tree Pleurotus (Pleurotus ulmarius) — Edible. 
This species closely resembles the preceding one except that it 
usually has a longer stem which is more nearly central in attach¬ 
ment to the cap and the color of the fungus is white or yellowish. 
It grows mostly upon dead elm ^vood and is usually solitary. Like 
the other species of pleurotus the flesh is rather tough. 
