24 



Mycologia 



the exception of Trinidad. To these must be added the Ber- 

 mudas, which, although far north of the recognized boundary are 

 rendered tropical by the Gulf Stream and contain a large per- 

 centage of West Indian species. 



Our present study does not include species occurring in South 

 America, but it has been necessary to examine them because so 

 many are common to the American tropics. The same is true to a 

 less extent of the oriental tropical species, several of which are 

 common to both hemispheres, owing, possibly, to former con- 

 nections by means of land now submerged. 



The gap between temperate and tropical North America is com- 

 paratively wide and abrupt, if we except the border species in 

 Mexico and southern Florida, and the few temperate species 

 occurring in the higher mountains in the tropics, where temperate 

 conditions prevail. The tropical collector misses such conspicuous 

 genera as Russula, Lactaria, Cantharellus, Hygrophorus, Amanita, 

 Amanitopsis, Tricholoma, Entoloma, Cortinarius, Paxillus, and 

 Inocybe, whose species compose such a large share of the gill- 

 fungi met with in our northern woods, and he must become 

 familiar with several new genera and a great many new species 

 that are peculiarly tropical. 



Tribe CHANTERELEAE 



This tribe, containing species with plicate hymenium, has been 

 treated in North American Flora, volume 9, part 3, the following 

 species being there recorded for tropical America: Plicatura 

 guadelupensis (Pat.) Murrill, Plicatura lateritia (Berk. & Curt.) 

 Murrill, Xerotinus martinicensis (Pat.) Murrill, Xerotinus 

 Mauryi (Pat.) Murrill, Xerotus caribaeus Fries (doubtful), 

 Asterophora Clavus ( SchaefT . ) Murrill, Trogia cinerea Pat., 

 Chanter el infundibuliformis (Scop.) Fries, C. cinnabarinus 

 Schw., C. mexicanus Fries, Neurophyllum ochraceum Pat., and 

 Chlorophyllum viride (Pat.) Murrill. Since the above was pub- 

 lished, the range of a few of these species has been extended by 

 recent explorations, and a change in nomenclature has been found 

 necessary in the two following cases. 



