BASIDIOMYCE TES 



22. Pileus fibrillose or silky. INOCYBE. 

 Pileus smooth and viscid. HEBELOMA. 



23. Margin of pileus incurved when young. NAUCORIA. 

 Margin of pileus straight ; pileus viscid ; lamellae free. PLUTEOLUS. 



- pileus not viscid ; lamellae attached. GALERA. 



(Brown-spored Series.) 



24. With a volva at the base. CHITONIA. 

 Without a volva. 25. 



25. Veil remaining on the stem as an annulus. 26. 

 Veil remaining attached to the margin of the pileus, often not apparent 



in very old specimens. HYPHOLOMA. 



Veil inconspicuous or wanting ; lamellae free. PILOSACE. 



lamellae decurrent. DECONICA. 



lamellae adnate or sinuate. 27. 



26. Lamellae iree from the stem. AGARICUS. 

 Lamellae united with the stem. STROPHARIA. 



27. Margin of pileus incurved when young. PSILOCYBE. 

 Margin of pileus always straight. PSATHYRA. 



(Black-spored Series.) 



28. Stem dilated above into a disc which bears the radiating lamellae. 



MONTAGNITES. 



Pileus of the normal form, leathery or horny. ANTHRACOPHYLLUM. 



fleshy, membranous or deliquescent. 29. 



29. Lamellae deliquescent, melting to an inky fluid. COPRINUS. 

 Lamellae not deliquescent ; annulus present. ANELLARIA. 



- annulus wanting. 30. 



30. Lamellae waxy, decurrent ; spores fusiform. GOMPHIDIUS. 

 Lamellae not waxy nor decurrent ; spores globose -ovoid. 31. 



31. Pileus striate ; stem with a cartilaginous rind. PSATHYRELLA. 

 Pileus not striate ; stem fleshy. PANAEOLUS. 



The above arrangement of the genera, like every other which is 

 based on single characters, is clearly artificial. Hennings* has 

 given a recent attempt at a natural arrangement, and while we 

 cannot agree with his combinations of genera nor with his shift- 

 ing of several generic names, we present an outline of his main 

 groups for the discussion of individual genera. 



* Die natiirlichen Pflanzenfamilien, i 1 **: 198-276. 1898. 



