164 : BENGAL PLANTS. [ Guide to Genera. — 
Segments of fronds very small and narrow; — 
the receptacle connecting ie Paps of few 
veins ...... 2. Onychium. — 
Segments of fronds conspicuous; the recep- 
tacle connecting the apices of many veins 
3. Pteris. 
{Sori remote from margin of frond :—[p. 163] 
Indusium linear or oblon ng :— 
Fronds simple or variously once or oftener 
pinnate :— 
wes membranous, parallel and close to 
and opening towards midrib 1135. Blechnum. 
Indusium divergent from midrib, single and 
opening towards midrib, or double and open- — 
ing both towards midrib oe Ere of leaf 
136, 
Indusium ren 
Pinnee teen ald, not articulate nor white- 
dotted aboy 1138. Nephraaee 
Pinns eae simple, articulate at base, wi 
whi its geben dots above...1139 Nephrolopis. 4 
+Sori without an indusium :—{p. 1¢ 3 
um, 
Fronds pi ai flabellate i Actinopteris. 
ifor 
ite 
1140. Polypodium. — 
Sori linear :— 
"> a Veins not all soriferous 
Sori erated ie on soriferous veins :— 
1 on the iia s only 
141. Gymnogramme- 
Sori on the pie connecting veinlets 
1142, Meniscium. 
i Aelhhichddded s6 2k Ce ee Or 
Fronds dimorphic ...,..1144. Drymoglossum. 
Veins freely anastomosing, all sage 5 
5. Hemionitis. 
Sori not confined to the veins, ie ecal over the — 
whole under-surface of the frond...1146. Acrostichum. 
