104 



(i) Texture of frond herbaceous, colour 

 dark-green, the veins clearly 

 visible. 



i. A. lujiulatum. 



(ii) Texture of frond leathery or almost 

 leathery, colour pale-green, veins 

 comparatively obscure, 

 i- Pinnae more or less lanceolate, 

 often caudate. 



2. A. falcatum. 



2. Pinnae rather linear-oblong or half- 

 ovate. 



3. A. laciniatum. 



(b) Pinnae with from half to whole of the 

 lower side cut away. 



4. A. umlaterale. 



II. Fronds 2-4 pinnate, ultimate divisions 

 linear. 



(a) Fronds dimorphous. 



5. A. dimorphiun. 



(b) Fronds not dimorphous. 



(i} Frond 6-8 inches broad, segment 

 distant. 



6. A. viviparum. 



