V. CYSTOPTERIS. 
81 
brown, slightly scaly near the base. The frond is tri- 
angular, tripinnate in the pinnules of the lower pinna?-, 
bipinnate in the rest of the froud ; both the pinnae and 
[Cystopteris momaua.] 
pinnules being spreading. The first pair of pinnae are nearly 
opposite, and very much larger than any of the others 
often in size nearly equalling all the rest ; the second 
pair are also nearly opposite, but the remainder gra- 
dually became alternate. The basal inferior pinnules of 
the lower pinnaj are very much larger and more divided 
than the superior pinnule of the same pair ; this dispropor- 
tion gradually decreasing until, near the apex of the 
pinnx, the opposite pinnules nearly correspond in size. 
