CHARACTERS OF TRIBES AND GENERA. 283 
J. Sm. (Adiantum, Linn.) (v v.); C. paupercula, Mett.; C. 
dichotoma, Sw.; C. Seemanni, Hook.; C. pedata, J. Sm. 
(v v.) (Hypolepis, Hook.); C. Schimperi, Kunze; C. ca- 
pensis (Sw.) (v v.). 
** Pteridopsis. 
Indusium binate, or elongating sub-continuous, including 
two or more clusters of sporangia. 
C. micropteris, Sw. (v v.); C. chlorophylla, Sw.; C. 
multifida, Sw. (v v.); C. mysurensis, Wall.; C. bullosa, 
Kunze.; C. Matthewsii, Kunze.; C. Wrightii, Kunze. ; C. 
Tweediana, Hook.; C. Sieberi, Kunze. (v v.); C. viscosa, 
Link. (v v.) ; C. tenuifolia, Sw. (v v.); C. varians, Hook. ; 
C. fragrans, Webb. (v v.) ; C. Moritziana, Kunze. ; C. micro- 
phylla, Sw. (v v.) ; C. alabamensis, Kunze. (v v.); C. 
chusana, Hook, 
eng Aleuritopteris. 
Indusium continuous, undulose crenulated, each crena including 
a cluster of sporangia. 
+ Fronds somewhat villose or slightly squamiferous. 
C. Dalhousie, Hook. ; C. subvillosa, Hook. 
+t Fronds with white farina on the under side. 
C. argentea, Kunze. (v v.); C. argyrostigma, J. Sm.; C. 
pulveracea, Presl ; C. farinosa, Kaulf. (v v.). 
Ops The latter species varies greatly in size, the fronds 
being sometimes so small that they are not distinguishable 
from C. argentea, which, as at present known, is never found 
exceeding 9 to 4 inches in height, whilst the native speci- 
mens of C. farinosa average from 6 to 12 inches, and when 
. cultivated under favourable circumstances attain a height 
.. of two feet, cultivation has not, however, increased the size 
of C. argentea; its small size may be considered constitu- 
