Cooke : Genera and Species in Fungi. 391 



Clavariaceae — Thelephoracece — Discomycetes 

 Again in the Tremellacese are such species as Tremella 

 sarcoides of Fries which, when fully developed, becomes Ombrop- 

 hila sarcoides with the ascigerous fruit of the Discomycetes, 

 but in the young state, and when undeveloped is only an ab- 

 normal Tremella, and is really the link between Tremella and 

 Bulgaria. 



In the Dacryomycetaceae is to be found the little yellow 

 Peziza shaped Dacryomyces chrysocomus, which finally is dis- 

 covered to merge into the genus Calloria, and thus form the 

 link between Dacryomyces and Pezizaceae. 



These examples might be multiplied for all the families 

 of the Hymenomycetes. For instance there is an exotic form 

 of Dcedalea quercina, which I pointed out to the late Rev. 

 M. J. Berkeley, and with which he agreed that in all essentials 

 it was a Lenzites, and thus linked Dcedalea (Polyporaceae) with 

 Lenzites (Agaricaceae) although neither a good Dcedalea nor a 

 good Lenzites. 



Moreover, there are two or three species of Foreign Lenzites 

 which are admitted to be abnormal, and link, that genus with. 

 Trametes (Polyporaceae) and thus the Agaricaceae glide imper- 

 ceptibly into the Polyporaceae. 



We might also indicate in Gasteromycetes a genus Gyro- 

 phragmiiim, consisting of a single species, native of Algeria, 

 which forms so close a link with Coprinus and Montagnites 

 {both of which belong to Agaricaceae) that it has been called 

 Montagnites Dunalii, and also Agaricus ocreatus, but it is the 

 link between the Hymenomycetes and the Gasteromycetes, 

 combining features of both natural orders, joining them through 

 Secotium and Polyplocium, all of which are genera unknown to 

 our local flora. 



And now perhaps I may indicate some of those which I 

 consider as ' links ' between different genera, which are perhaps 

 even more numerous than those between ' families * and 

 ' natural orders.' 



Any one who is acquainted with Clitocyhe will remember 

 that there is a section called * Difformes.' Now, it is a patent 

 fact that many of the species in this section approximate so 

 closely to Tricholoma that many persons consider it equally 

 entitled to a place as a section of Tricholoma to that of Clitocyhe, 

 and one or two of these species might be selected as veritable 

 links between Tricholoma and Clitocybe. 



1909 Nov. I. 



