SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOL. 98, NO. 7, PL. 7 



i. Rooseveltia, basal section of 2. Plectis, lower section of rachis 



the rachis showing insertions of 5 with only 2 pinnae on each side, 



pinnae, the middle pinna lost, but widely separated. (Natural size.) 

 the scar perceptible. 



Base of Rachis of Rooseveltia and Plectis 



