Fig. 65. 



PSEUDOCOLUS GARCIAE. 



THE GENUS CLATHRUS. 



This genus has a receptacle consisting of a simple "sessile" net- 

 work, bearing the gleba on the inner side. When young, the gleba 

 forms a mass, filling the center of the egg ; but as the plant expands, 

 the gleba deliquesces and remains attached to the inner surface of 

 the receptacle. The genus Clathrus as comprised in this pamphlet 

 consists of two very distinct genera. Clathrus (true), with the re- 

 ceptacle composed of large cells, and Ileodictyon, with the receptacle 

 formed of tubes. Clathrus cancellatus belongs to the former ; Clathrus 

 cibarius and gracilis to the latter. Where the other species belong 

 we do not surely know, and hence do not attempt to maintain them as 

 two genera. 



CLATHRUS CANCELLATUS (Fig. 70). Color, bright red. 

 Meshes of the network subequal. Receptacle subglobose, composed 

 of large cells, becoming torn and lacerate on the inner surface, the 

 outer surface smooth, even. This well-known species is a native of 

 Southern Europe. It is not rare in Italy and Southern France. It 

 is a plant of warm regions and does not occur in Northern Europe 

 except where the climate is modified by the Gulf Stream. It is 

 found rarely on the channel coast, both of France and England, and 

 even extends up into Holland. It occurs in Northern Africa, and has 



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