Argyrochosma dealbata

This species, common in central Texas on limestone, is similar to Argyrochosma limitanea and most easily distinguished by location; the two do not overlap in range, with Argyrochosma dealbata occurring east of Argyrochosma limitanea's range.

Plant habit at Pedernales Falls, 14 Aug 2005.

Adaxial view of a pinnae, showing sori, at Pedernales Falls, 14 Aug 2005.

Plant habit at Hamilton Pool, 3/19/04.