GENERA OF FERNS. 425 
Sect. II. DAvALLIEE, J. Sm. 
Sporungia pedicellate, produced from a simple terminal 
receptacle. Special indusium usually more or less attached 
by its base and sides, rarely attached by its base only, its 
free apex mostly equal with the concave indusiiform margin, 
forming an urceolate, bilabiate or tubular vertical cyst. 
103. Humarta, Cav. 
(Davallize sp. Sm. et Auct.) 
Veins simply or pinnately forked ; venules direct, thicken- 
ing upwards, their apices free and sporangiferous ; indusium 
subrotund or reniform, shorter or nearly equal with the 
margin, usually plane, its sides free; sori round ; sporangia 
vertical. 
Fronds coriaceous, simple, linear-lanceolate, entire or sinuous, 
or deltoid and pinnatifid, the lower segments -usually deeply 
lacinated ; veins immersed, all, or the lower exterior 
venule only soriferous; sporangia usually vertical, sporules 
globose. 
Species. 1. H. angustata (Wall) 2. H. ophioglossa, - 
Cav. (Davallia heterophylla, Sm. D. lobulosa, Wall.) 3. H. 
pedata, (Sm.) 4. H. pinnatifida, Cav. 5. H. trifoliata, 
(Sm.) 6. H. pectinata, (Sm.) 7. H. Gaimardiana, J. Sm. 
(Nephrodium, Gaud). 
Aust. Hook. et Grev, Ic. Fil. t. 139, 230. Gaud. in Freye. 
Voy. t. 12. 
Obs. Although the habit of the species constituting this 
genus is very distinct from either the preceding or following 
genus, yet there is little or no real difference in the character 
of their sori, to justify the necessity for their being separated ; 
but, nevertheless, as in other cases, it appears to me that it 
will be better, for the purpose of arrangement, to consider 
them as distinct groups, the thick veins and coriaceous tex- 
ture of the indusium will assist in determining Humata from 
the proximate genera. I have already noticed that a transi- 
tion is formed from Aspidiee to this tribe through Nephro- 
