FOSSIL PLANTS. 195 



Culmites. Three species from the tertiary beds. 

 Sterribergia. Columnaria of Stemberg.* 



Three species in the coal formation. 



LEATES ONLY KNOWN. 



Poacites. Several species in the coal formation. 

 Phyllites. Potamophyllites of Brongniart. One species 

 in the lower fresh-water formation. 



FRUITS ONLY KNOWN. 



Trigonocarpum. Ad. Br. Five species in the coal forma- 

 tion. 



Amomocarpum. Ad. Br. One species in the tertiary 

 formations. 



Musocarpum. Ad. Br. Two species in the coal formation. 



Pandanocarpim. Ad. Br. One species in the tertiary 

 strata. 



CLASS VI. DICOTYLEDONOUS PHAKEBO GAMINE. 

 15th Family. AMENTACEJE, THE BIRCH TRIBE. 



Carpinus, letula, and comptonia. One species of each in 

 tertiary lignite. 



DOUBTFUL AMENTACE^. 



SaUx, populus, castanea, and ulmus. In upper fresh-water 

 formation. . - 



16th Family. JUGLANDE.E, THE WALNUT-TREE TRIBE. 



Three species in the tertiary strata. 



One species in the upper beds of new red sandstone. 



17th Family. ACERINE.E, THE SYCAMORE TRIBE. 

 Some dubious leaves found near Frankfort. 



18th Family. NYMPHEACE.E, THE WATER-LILY TRIBE. 



NympTitsa. Upper fresh- water formations. 

 Flowering plants which cannot, with certainty, be referred 

 to either the monocotyledonous or dicotyledonous class. 



* Pict. Atlas, pi. xviii. 



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