335 



Bleeding Agaric (Agaricus hoemorhoidarius], Shaggy Caps (Coprinus 

 comatus], Warty Caps (Amanita rubescens), The Parasol Mushroom 

 (Lepiota procera\ Sheathed Agaric (Amanitopsis vaginata). Scaly 

 Agaric (Lepiota rachodes\ Chocolate Agaric (Lepiota emplastrd]. Ble- 

 wits (Tricholoma personatum\ Funnel Mushroom (Clitocybe maxima], 

 Amethyst Agaric (Tricholoma nudum\ Horn-of-Plenty (Crater ellus 

 cornucopioides). Great Puff-ball (Ly coper don giganteum\ Edible Boletus 

 (Boletus edulis), The Common Morel (Morchella esculenta). 



Poisonous Varieties of Fungi. Bulbous Agaric (Amanita mappa), 

 Warted Agaric (Amanita pantherina), The Death Cap (Amanita phal- 

 loides\ Fly Agaric (Amanita muscaria), Shield Agaric (Lepiota cly- 

 peolaria\ Glutinous Agaric ( Volvaria gloiocephala\ Verdigris Agaric 

 (Stropharia aentginosa\ Purple Agaric (Cortinarius purpurescens). 



F. L. STEVENS and HALL. Variation of Fungi due to environ- 

 ment. (Bot. Gaz., 48 (1909), No. i, pp. 1-30, figs. 37) E. S. 

 R., XXI Dec. 1909. 



Attention is called to the variation found in studies of fungi 

 made during the past few years, and attempts were made to analyze 

 the cause of the variations to the end that the factor of environ- 

 mental variation may be more clearly recognized as a problem in 

 mycology. The effect of density of colonies, [density of myce- 

 lium, chemical relations, light relation, and several unknown factors 

 are discussed at length, and the variability in spore measurements 

 due to various factors is shown by means of diagrams. 



The authors state that the bearing of these facts on mycolo- 

 gical taxonomy is apparent, and that the tendency to variation 

 should be recognized in making studies of many fungi. They be- 

 lieve that many fungi should be studied in cultures, under suitable 

 standard conditions, in order to determine some of their more im- 

 portant taxonomic characters. 



'A. H. R. BULLER. Researches on Fungi. London, New York, 

 Bombay and Calcutta, 1909, pp. VI-f-28y, pp. 83. Reviewed in 

 E. S. R., XXII May 1910. 



Part I of this work includes investigations of the production, 

 discharge, and dispersal of the spores of the Hymenomycetes treated 

 botanically and physically. Part II is a similar treatment' of the 



