FEBRUARY. 37 
III. ACROGENS. 
Cryptogamic plants are known by their having no con- 
spicuous flowers, as Ferns, Mosses, Lichens, Sea-weeds, &c. 
They are divided into two classes, Foliacee, producing dis- 
tinct leaves, and Aphyilea, leafless. 
Foutace® contains, Filices, Equisetaceea, Musci, and Jun- 
germanniacee. 
APHYLL& contains, Lichenes, Fungi, Alga, Characee, and 
Marchantiacee. 
The orders of Fodiacee will alone be mentioned here. 
1. Filices.—A distinct stem and leaves, the latter usually 
divided into numerous pieces, marked with forked veins, 
and rolled up when young. The productive organs 
either on the backs of the leaves, or on the margin, or 
wrapped up in contracted and deformed leaves. 
2. Hquisetacee.—A. distinct stem, furrowed, hollow, and 
branched in a whorled manner. Leaves in the form of 
hollow sheaths, toothed. Reproductive organs in cones, 
and consisting of a spore, surrounded by filaments 
twisted spirally. 
3. Musci._-A distinct stem, covered with simple, im- 
bricated, veinless leaves. Reproductive organs con- 
