46 



FOSSIL COAL PLANTS. 



nent parts, to reconstruct this curious plant, and especially 

 if its fructification can be obtained, its classification will 

 be a matter of much^less difficulty^hanjiow^^ I 



CARDIOCARPON SAMAR^FOKME. 



Nucleus round-cordate flat, | inch in 

 diameter, faintly concentrically striate 

 and reticulate, a fine elevated line run- 

 ning from base to apex ; base strong- 

 ly marked with the cicatrix form- 

 ed by the detachment of the organs 

 of support and nutrition. Attached 

 to the nucleus are broad, apparently 

 Fig. 1.— c. samarseforme. mombranous wings, wliicli spring from 

 the cicatrix at the base, encircle the nucleus, becoming 

 broader as they approach the apex, where they meet; from 

 this point they rise, diverging from each other with a 

 rounded outline, to a height nearly equal to the diameter 

 of the nucleus. Wings distinctly veined and having a 

 thickened border. 



Shale over coal at Cuyahoga Falls. 



Nucleus heart shaped, or short ovoid acu- 

 minate, ^ inch in diameter, flattened, faintly 

 striate, marked at base by the cicatrix of ped- 

 icle, surrounded by an annular margin of 

 nearly equal breadth, which is sometimes 

 emarginate at the summit. This species re- 



Fig. 2. . 



c. Annuiatum. semblos C. emarginatum^ Goepp. & Berger, 

 but difiers from it in the absence of the emargination of the 

 border at the base, and in the slight emargination at the 

 apex, a character frequently wanting in my specimens. 



Shale over coal. Youngstown. 



Nucleus broad, heart shaped, flat, smooth, 

 sharply acuminate, marked with a cicatrix at 

 base, and surrounded, except at the basal cica- 

 trix, with a narrow margin terminating like 

 Fig. 3.-c?Lrtum.the nuclous in a sharp point at the summit. A 









