Reboulia hemispherica (L.) Raddi
Plate of original, pencil line-drawings by Mary F. Linder. Her legend is given below.

"Explanation of Plate XIII.

1. Asterella hemispherica - natur [sic] size.


[There is a large space between caption numbers 1 and 2, as if leaving room for additions.]


2. The ventral surface of the frond showing the arrangement of the scales."

Courtesy of University of Iowa Libraries, Special Collections