218 
sori on the contracted apex ; stipes adher- 
ent to the rhizome. 
Genus XLVI.—Gymnuopteris Berah. 
Veins uniform, reticulate, meshes with- 
out free included veinlets, no main veins 
present ; fronds pinnate, the upper pinnz 
smaller and wholly covered with sporangia 
on the under-surface. Stipes adherent to 
caudex. Geaus XLVII.—Acrostichum L. 
SUB-ORDER III—OSMUNDACE/ 
Capsule two valved, opening across the 
apex with a short horizontal ring ; verna- 
tion circinate. 
Fertile frond wholly on the upper or 
middle portion contracted, forming simple 
or compound panicles bearing sporangia ; 
veins forked free ; fronds pinnate or bipin- 
nate, articulated with the rachis. 
Genus XLVINI.—Osmunda L. 
SUB-ORDER IV.—SCHIZHACEA 
Sporangia two-valved, crowned by a 
complete apical ring. Vernation circinate. 
PAGE 
183 
Igt 
192 
