66 



THE ARCHAEOPTERIS FLORA 



[CH. 



falcate. Detailed structure of cone unknown. This genus is now 

 fairly well known from a species occurring both in the Lower 

 Carboniferous of England and in the Upper Devonian of America. 



'■"te^/. 



Fig. 38. Archaeosigillaria Vanuxemi, 

 (Goepp.), from the Upper Devonian of 

 the United States, and Lower Carboni- 

 ferous of England. (1) Leaf scars en- 

 larged |. (2) Leafy twigs (nat. size). 

 Specimens Nos. 1099 and 1106, Car- 

 boniferous Plant Collections, Sedgwick 

 Museum, Cambridge. (W.Tamsphoto.) 



Fig. 39. Archaeosigillaria primaeva, 

 White, from the Middle Devonian 

 of the United States. Stem with 

 leaf scars (reduced). After White 

 (1907). 



In the latter country it also occurs in Middle Devonian beds"^.. 

 It is also probable that, as White ^ has suggested, certain 

 North American fossils ascribed to Lepidodendron really belong 

 here. 



1 White (1907). = /^itf. (1907), p. 339. 



