1918] BRIEFER ARTICLES 10g 
A NEW POISONOUS MUSHROOM 
(WITH THREE FIGURES) 
The genus Clitocybe is a large one, with approximately 400 species. 
Very few of this large number are known to be poisonous or deleterious 
in other ways when eaten. Among these may be mentioned from North 
Fic. 1.—C. acromelalga growing on ground in bamboo forest 
America the phosphorescent species C. illudens Schw., which produces 
serious nausea, and C. sudorifica Pk., which, eaten in small quantities, 
causes a “profuse perspiration sometimes continuing for 5 or 6 hours’’ 
(N.Y. State Mus. Bull. no. 157. 68. 1912), but is “sufficiently toxic to 
cause the death of frogs, rabbits, and guinea pigs.” It is a matter of 
