X 
Eremobryoid Series. 
Humata / 
-r i • f XJ ciV clillcl- 
Eeucostegia l 
Oleandra. 
Eupoly podium \ 
Goniophlebium f ^ . .. 
-» T • , \ . VFolypodium. 
JNipho bolus ( 
Phymatodes / 
Habit creeping. Gleichenia. P. proliferum. Lygodium. 
,, arborescent. Cyatliea Hemitelia Alsophila. 
Dicksonia Barometz. 
Frond dimorphous. Dav. (humata). P. (drynaria). 
Acrost. (Gymnopteris). (Chrysodium). Dry- 
moglossum. 
grasslike. Vittaria. 
matted beneath. Nothochleena P. (niphobolus,) 
P. angustatum. 
powdery beneath. Cheil. (Aleusopteris)Gymno- 
gramme (Ceropteris). 
with alternate divisions linear, cuneate, Ony- 
chium. Aspl. (Darea), Actiniopteris radiata. 
with segments dimidiate. Dav. (Odontoloma). 
Adiantum. Lindsaya. 
or subdimidiate Dav. immersa. 
99 
99 
99 
14. As a rule, fertile and barren fronds do not differ ; 
when they do, the species is dimorphous , two-shaped : 
this is not a narrowing only of fertile frond which is a 
