posed, with Presl, to retain it in Grammitis. The sterile and fer- 
tlie portions of the fronds are quite uniform, and the principal 
characteristics of Xiphopteris are wanting: sori are produced on 
all the segments alike. 
Puate 44. Fertile plant of Xiphopteris serrulata, Kaulf.,—natural size. Fig. 
1. Portion of a fertile frond,—magnified. 2. Fertile, and 3. sterile portions of 
a frond; 4. Capsule :—more magnified. 
. 
