THE PARTS OF A FERN. 
KEY TO THE DIAGRAM. 
A to C. — The Frond. 
A to B.— Stipes. 
D. — The Primary Rachis : the branches are the secondary 
Rachis. 
E. E. — Pinna:. 
F. F. — Pinnules. 
G. G. — Scales. 
H. — Rhizome, with the true roots. 
I. — Caudex, with the true roots. 
K. — Radicles, or true roots. 
L. — Venation, — the arrangement of the veins which 
intersect the Pinnules. The principal vein being 
a continuation of the Stipes, is called the Costa : 
the rest, Costules, Veins, and Venules. 
M. — Fructification, — the parts containing the seed-like 
spores. The several parts are named on the 
Plate. For full details upon the terms used in 
describing Ferns, see “ Ferns, British and Foreign,” 
by J. Smith, c. 2 — Organography. 
N. — Spores. 
