Plate VII. LYCOPODIALES 



The surviving genera of this order are our present day 

 club mosses Lycopodium and Selaginella. From the Penn- 

 sylvanian are known tree forms Lepidodendron, Lepido- 

 phloios, and Sigillaria, and a herbaceous type Lycopodites. 

 Syringodendron is the name for a Sigillaria type which 

 had lost its characteristic bark before fossilization. Lepi- 

 dostrobus is the fructification of Lepidodendron. Stig- 

 maria is the name for the roots of Lepidodendron and 

 Sigillaria. (See Plates VII to XII.) 



1. Lepidostrobus ovatifolius Lesquereux (cone of Lepidodendron). 



2. Lepidodendron lanceolatum Lesquereux. 



3. Lepidostrobus communis Lindley and Hutton. 



4. Lepidodendron latifolium Lesquereux. 



All are from Mazon Creek, K Coll. 



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