1238 BENGAL PLANTS. [ Gleichenia. 
Order CLII. GLEICHENIACE. 
Herbs, often pe oer caudex mostly creeping; stem often 
dichotomous; fronds rigid, generally large and dichotomously 
ivided, frequently ane axillary bulbils; vernation circinate. 
Sori dorsal, with few (2-10) sporangia that are surrounded by a 
broad, transverse, complete ring, and open vertically ; indusiwm 
sent. 
1125. Gleichenia Smith. 
Herbs, usually rigid; caudex usually creeping; fronds rarely 
simple, generally dichotomously branched, often proliferous at the 
axils of the forks, the pinne deeply pinnatifid, with small, concave 
segments, suborbicular or pectinate, with elongated lobes. Sort 
of few sessile sporangia, usually 2-4, rarely 5-10, situated on 4 
lower exterior veinlet. 
742, GLEICHENIA LINEARIS Bedd. ; F. I. C. 4 
Chittagong; Chota Nag 
A ae nea, drchoteenoualy divided climbing fern. 
Order CLIII, POLYPODIACEZ. 
Herbs, rarely trees; caudex erect or creeping; fronds herba- 
ceous or coriaceous, rarely membranous; vernation circinate. 
Sort dorsal or marginal, with many sporangia, inc cluded or not in 
a thse: indusium, seuaihe pedicelled, more or less completely 
unded by a jointed, vertical elastic ring, and usually bursting 
tiara 
Trees; sori without an indusium Alsophila. 
*Sori furnished with an indusium :—[p. 1239] 
Fronds delicately membranous, transparent ; renaaer” a apical on & 
vein, tubular ichomanes. 
Fronds herbaceous or coriaceous, am — 
tSori marginal or submarginal :—[p. 1239] 
{Indusium opening apically te edge of frond :—[p- 1239) 
Sori discrete ; indusium apical or subapical on a vein 
Davallia. 
Sori in a continuous or subcontinuous, marginal or submat- 
ginal line ; indusium double, inner valve soneaeds? 
SESE RES SEY Nice Weta Sv ee 
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