839 



f Fronds pinnated, especially below. 

 ff Fronds pinnatifidly divided. 

 **** Fronds decompound ; margins entire (not 

 hairy nor ciliated). 



t Fronds pinnatifidly divided. 

 \\ Fronds pinnatedly divided. 



[Genus] 12. — Trichomanes. 



Subgenus I. — Hymenostachys. 

 Subgenus II. — Feea. 

 Subgenus III. — Eutrichoraanes. 



* Fronds entire, lobed or digitate. 



f Veins radiating from the base or fla- 

 bellate, dichotomous, rarely and 

 only very partially reticulated. Cau- 

 dex creeping, 

 ft Fronds with a central costa or rib, 

 pinnated with simple or dichoto- 

 mous oblique veins, 

 tft Fronds with only a solitary central 

 vein or costa in each segment. 

 ** Fronds pinnatifid in [two species] almost 

 bipinnatifid. 

 *** Fronds throughout pinnatifidly divided, de- 

 compound; i. e. twice or more pinnatifid. 

 (Fronds erect tufted. Caudex creeping but 



short or none. 

 (Fronds remote, from an elongated creeping 

 caudex). 

 **** Fronds simply pinnated. 



Fronds tufted. Caudex short creeping or 



none. 

 (Caudex elongate creeping). 

 ***** Fronds pinnated or bipinnate, the pinnae or 

 pinnules pinnatifidly decompound. 

 Fronds tufted. 

 Fronds from an elongated creeping caudex. 



Tribe III.— DAVALLIEvE. 



[Genus] 1. — Davallia. 

 Subgenus I. — Humata. 



* Fronds simple entire, or, the fertile only, si- 



nuated. 

 ** Fronds pinnatifid, the lower segments bipin- 

 natifid, rarely pinnated. 



