ANALYSIS OF GENERA OF NATAL FERNS. 
Fructification dorsal i.e. on back of frond ... 
„ spicate 
11. 
„ paniculate 
III. 
Sori 
I. 
covered with an indusium 
A. 
11 
naked 
B. 
A. 
Indusium cup-shaped 
a. 
,, tubular 
b. 
„ continuous, marginal 
V. 
„ semilunate „ 
d. 
„ kidney-shaped 
e. 
„ linear, oblong, sometimes curved 
Aspleniuin. 
„ round, attached by centre... 
Aspidiutn. 
,, elliptical, apparently doubled 
Didymochlcena. 
„ having the capsules attached beneath 
Adiantum. 
Fertile fronds contracted ; pinnate 
/• 
a. 
herbaceous 
Woodsia. 
a. 
arborescent; cup complete - 
Cyathea. 
a. 
„ „ incomplete 
Hemitelia. 
b. 
indusium two-valved ... ... 
IhjmenophyHum 
b. 
„ entire or nearly so 
Trichomanes. 
b. 
„ attached by base and sides ... 
Davallia. 
b. 
„ „ „ base only ... 
Cystopteris. 
c. 
„ opening outwards 
Lindsaya. 
c. 
„ at first globose, not quite continuous 
Cheilanthes. 
e. 
c. 
receptacle punetiform ; fronds coriaceous ) 
except P. geraniifolia. j" 
receptacle continuous; fronds herbaceous) 
except P. aquiUna. J ” 
Pellcea , 
Pteris. 
d. veins netted 
d. „ free 
e. pinnae jointed to rackis 
e. „ not jointed 
4!. frond simple .• 
f. sori marginal 
/. ,, intramarginal ... 
Loncldtis. 
Hypolepis. 
Neplirolepis. 
Nephrodium. 
Oleandra. 
Lomaria. 
Blechnum. 
B. 
Sori round, distinct, capsules numerous 
M „ confluent and marginal 
„ linear or oblong, sometimes forked ... 
M „ continuous sliglitly intramarginal 
„ marginal, capules few, large ..- 
Polypodium. 
Nothochlcena. 
Oymnogrammt .. 
Vittaria. 
Mohria , 
