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.) (Hypol&pis, 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. chlorophyll a, 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. 



*** Aleuritopteris. 



Indusium continuous, undulose crenulated, each crena including 



a cluster of sporangia. 



f Fronds somewhat villose or slightly squamiferous. 

 C. Dalhonsiae, Hook. ; C. subvillosa, Hook. 



ft Fronds with white farina on the under side. 



C. argentea, Kunze. (v v.) ; C. argyrostigma, /. Sm. C. 

 pulveracea, Presl ; C. farinosa, Kaulf. (v v.). 



OBS. 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 2 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- 



