n 



PAL^ONTOLOGICAL BOTANY. 



genera; several species of Odontopteris, Callipteris, Cyclop- 

 teris, Dioonopteris, Cyatheites, Alethopteris, Noeggerathia, 



Fig. 55. 



Cordaites, Antliodiopsis, Dictyotlialamus, Calamodendron, 

 Artliropitys ; besides species of Sigillaria, Stigmaria^ and 

 Lepidodendron. Various fruits are also mentioned, under 

 the names of Rhabdocarpum, Cardiocarpum, Acanthocarpum, 

 Trigonocarpum, and Lepidostrobus. 



FOSSIL FLORA OF THE SECONDARY OR 

 MESOZOIC PERIOD. 



Reign of Gymnosperms. 



The Gymnospermous plants of the present day are included 

 in two natural orders, Coniferas and Cycadaceas. Under 

 Conifers are enumerated the yarious species of Pine (Fig. 57), 

 Spruce (Fig. 58), Larch (Fig. 59), Cedar (Fig. 60), Eutassa, 



Figs. 55 and 56. WaWiia jnniformis, Sternb., a common species 

 in the Permian rocks of Europe. Fig. 55. Plant with leaves and 

 fructification. Fig. 56. Fructification, natural size. 



