XXIV 
126. Lycopodiacese. Stem more or less elongated, often 
dichotomous, covered with numerous small, simple Is. Sporo- 
carps all of the same form in the axils of bracts resembling 
Is, or of bracts having a different form (and being then united 
in spikes). 
3. Sporocarps with several spores, arranged on 
the inner face of peltate, whorled scales which 
are disposed in the form of a terminal spike. 
Spores all of the same form. Stem articulate, 
simple, or with whorled branches. Ls reduced 
to toothed sheaths. Ganopterides. 
127. Equisetaceae. Spores each surrounded by 4 elastic, 
thread-like appendages, club-shaped at the top and rolled 
spirally round the spores. 
4. Sporocarps containing several spores arranged 
in groups on the underside of the (some¬ 
times modified) ls. Spores all of the same 
form. Stem inarticulate, forming a rhizome; 
but ls (fronds) developed, often much di¬ 
vided, gen. rolled up (like a watch-spring) 
while young. Filices. 
125. Ophioglosseae. Fronds not rolled up spirally while 
young, of two kinds, the one fertile, modified (in the form of 
a panicle or spike), the other barren. Sporocarps let into the 
leaf-substance, opening by a longitudinal fissure. 
129. Osmundaceae. Fronds rolled up spirally while young. 
Sporocarps pedicelled, arranged in a panicle in the upper (trans¬ 
formed) part of the frond, without an elastic ring, opening 
by 2 valves. 
130. Polypodiaceae. Fronds rolled up spirally when young. 
Sporocarps united on the lower side of the frond (modified or 
not by fructification) in groups (sori) of various forms, which 
are often covered by an indusium, surrounded by an articulate, 
elastic ring and bursting irregularly. 
