4 AGAEICINI. 



X Witliout a ring. 



Gills adhennp: to tlie hymenopho- 

 rum, and sinuate ...... 20. Hebeloma. 



Gills separating from the hymeno- 

 phorum, and decurrent .... vi. Paxillus. 



t Stem lateral or absent 22. Crepidotus. 



* With cartilaginous bark. 



Gills decurrent . 25. TuVaria. 



Gills not decurrent. 



Margin of pileus at first incurved . . 23. Nancoria. 



Margin of pileus always straight . . 24. Galera. 



IV. Spores purple, sometimes brownish-purple, dark purple, or dark 

 brown.— Pratellce. 



* "Without cartilaginous bark, 

 t Hymenophorum free. 



X With a ring 26. Psalliota. 



X Eingless 27. Pilosace. 



t fiymenophorum confluent. 



Veil normally ring-shaped on the stem 28. Stropharia^ 

 Veil normally adhering to the margin 



of pileus 29. Hypholoma. 



* With cartilaginous bark. 



Gills decurrent 32. Deconica. 



Gills not decurrent. 



Margin of pileus at first incurved ... 30. Psilocyle. 



Margin of pileus at first straight ... 31. Psathyra. 



V. Spores black, or nearly so.— Coprmarii. 



Gills deliquescent ii. Copetnus. 



Gills not deliquescent. 



Gills decurrent viii. GoMPHlDlUS. 



Gills not decurrent. 



Pileus striate 34. Psathyrella. 



Pileus not striate 33. Panoeolus. 



Gemis 1. AGARICUS, Linn. Sysl. Nat. (1735). 



Spores of various colours ; gills membranaceous, persistent, 

 witli an acute edge ; trama floccose, confluent with the inferior 

 hymenium. Fleshy fungi, putrifying, and not reviving when 

 once dried, hence differing from such genera as are deliquescent, 

 coriaceous, or woody. 



This genus is di\'ided into five series, according to the colour of the spores, 

 the subgenera in each series are arranged in the accompanying plates. 

 Each sf-ries consists ty pi call}' of three groups. 



1. — Hymenophore distinc' from the fleshy stem. 



2. — Hymenophore confluent and homogenous with the fleshy stem. 



3, — Hymenophore confluent with, but heterogenous from, the cartilagin- 

 ous stem. 



These three groups are kf pt distinct in the plates, the subgenera in each 

 series corresponding in position with its analogues in the other series. 



