To find the name of a fern. Observe if the stem divides into two branches or forks. 
(</) Feather-like parted (pinnatifid), i. e., divisions not reaching to midrib or stem. 
( h ) Feather-like divided (pinnate), i. e., divisions reaching to midrib or stem. 
(e) Once divided, and divisions parted. 
(d) Twice divided (two pinnate). 
(if) Twice divided, and divisions parted. 
(/) Three times divided (three pinnate, or ternate). 
Compare general shapes, stems, and points with drawings on the black-ground plates : also 
lower leaflets with detail drawings in regard to veins, sawteeth, points, and fruit dots. 
The drawings are all about one-third natural size. 
