TABLE OF BRITISH FERNS. 
15 
Trichomaninese — fructification marginal, that is, 
having the spore-cases on the edges of the frond ; 
soil produced around the ends of the veins project¬ 
ing from the frond-margins, and surrounded by urn¬ 
shaped membranes expansions of the frond: two 
genera — * Trichomanes , Hymenophyllum. 
Osmundineae — fructification marginal-paniculate, 
that is, having the spore-cases on the edges of 
distinct stalks, or in irregular dense branching 
clusters terminating the fronds : one genus — 
Osmunda. 
OPHIOGLOSSACEiE. 
Fructification paniculate, in irregularly branching 
clusters, spicate, or sessile (sitting close to the stem 
without any sensible stalk) in two ranks on a simple 
spike, terminating a separate branch of the frond j 
two genera BotrycJiium , Ophioglossum. 
* See note at page 14. 
CIRC INATE 
