THE ROSY-SPORED AGARICS OF NORTH AMERICA 
WILLIAM A. MURRILL 
New York Botanical Garden 
This subtribe of the gill-fungi is characterized by rosy or rosy- 
ochraceous spores and is well represented by the common and widely 
distributed species, Pluteus cervinus. ‘The North American species 
may be grouped in ten genera, distinguished by the following key: 
Subtribe PLUTEANAE 
Pileus irregular, dimidiate or resupinate. I. CLAUDOPUS. 
Pileus regular, sometimes eccentric in Pleuropus. 
Volva and annulus wanting. 
Stipe cartilaginous. 
Margin of pileus incurved when young. 
Lamellae decurrent. 2, ECCILIAY 
Lamellae adnate or adnexed. 3. LEPTONIELLA. 
Margin of pileus straight and appressed when young; 
lamellae free or adnexed. 4. NOLANEA. 
Stipe fleshy. 
Lamellae decurrent, rarely varying to adnate. 5. PLEUROPUS. 
Lamellae sinuate or adnexed. 
Spores not angular, rosy-ochraceous in mass. 6. LEPISTA. 
Spores angular, rose-colored in mass. 7, ENTOLOMA. 
Lamellae free. 8. PLUTEUS. 
Volva wanting, annulus present. g. CHAMAEOTA. 
Volva present, annulus wanting. 10. VOLVARIOPSIS. 
A few of these generic names may be unfamiliar to you, such as 
Leptoniella for Leptonia, Pleuropus for Clitopilus, and Volvariopsis 
for Volvaria, but these changes have been required by the rules of 
nomenclature. 
The time at my disposal will not permit more than a hasty sum- 
mary of the North American species belonging to these genera. A 
fuller treatment may be found in North American Flora, volume 10, 
part 2, to be issued shortly. 
I. CLAUDOPUS 
Claudopus nidulans, the best known species, occurs throughout 
Canada and the United States; C. avellaneus is known from Oregon 
only; and there are no species reported from tropical North America. 
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