iii 
t t 
[A] 
(1) 
[B] 
(Aquatic Annual proliferous ferns, with contracted fertile fronds.) 
Spore-cases two valved, bursting vertically at the apex. Ring rudimentary, obliquely trans- 
verse near the apex. 
Spore-cases without a jointed ring. 
Fructifications dorsal on normal fronds, (vernation circinate or incurved.) 
Sori-oblong distinct, longitudinally bi-valved. 
(a) Spore-cases free, crowded in two opposite linear series. 
(B) Spore-cases concrete, in tw.o opposite linear series. 
Fructifications marginal, on rachiform fronds or branches, (vernation straight.) 
Lycopodales. — Acrogenous plants with axillary radical or petiolar one-four or many- celled 
spore-cases. 
* Spore-cases one-three-celled, in the axils of the Stem-leaves or bracts. 
—Stems leafy ; Spore-cases oiie-threc-celled. 
Tribe 6. 
Ceratoptekidine.e. 
Tribe 7. 
OSMUNDINE.'E. 
Order. 
MAFvATTIACEiE. 
Tribe 1. 
Marattine^. 
§ 1- 
Angiopteridese. 
§ 2. 
]\Iarattie£e. 
Order. 
OPHIOGLOSSACEiE. 
Order. 
LYCOPODIACE^E. 
LYCOPODIE.E. 
