UAVALL1A. 



47 



GENUS III. 



DAVALLIA. Swartz. 



The genus Davallia has been divided into several families, 

 as Humata, Davallia, Leucostegia, Odontosoria, and Microlepia. 

 Sir W. J. Hooker, in his "Species Filicum," connects them all 

 together again; and indeed the similarity in many respects is 

 so striking that it did not seem wise to change the tribe 

 comprising Davallia into half a dozen families, and we there- 

 fore must feel obliged to Sir William Hooker, for removing a 

 number of unnecessary names, as far as genus is concerned. 



Those Ferns constituting Humata have linear-lanceolate, 

 entire, pinnatifid, or deltoid-bipinnatifid fronds; those of 

 Davallia usually deltoid, pinnate, or bi-tripinnate. In Leu- 

 costegia deltoid, tripinnatifid, or multifid; occasionally lanceolate 

 and bipinnatifid. In Odontosoria bi- tripinnatifid, lanceolate, or 

 deltoid. In Microlepia pinnate or bi-tripinnatifid. 



Veins forked; venules free. 



Sori terminal and vertical. Indusium tubular, more or less. 



Length of frond from three to seventy inches. 



Mr. J. Smith gives the following in his "Catalogue of the 

 Ferns cultivated at Kew:" — 



Humata heterophylla, J. Smith. 



pedata, J. Smith. 

 Davallia pentaphylla, Blume. 



ornata, JVallich. 



solida, Swartz. 



pyxidata, R. Brown. 



elegans, Swartz. 



divaricata, Blume. 



dissecta, J. Smith. 



bullata, JVallich. 



Davallia Canadensis, Swartz. 



Lindleyi. Hooker. 

 Leucostegia immersa, Prcsl. 



chaerophylla, J. Smith. 

 Odontosoria tenuifolia, J. Smith. 



aculeata, J. Smith. 

 Microlepia cristata, J. Smith. 



platyphylla, /. Smith. 



polypodioides, Presl. 



Nova? Zelandia3,/.A$WM. 



