CHARACTERS OF TRIBES AND GENERA, 207 
Species with both free and anastomosing veins, the technical 
character consisting in all having a reniform indusium. 
Schott restricted the genus to the species having anas- 
tomose veins only. 
In the “Species Filicum" thirty-four species come under 
this character, of which the following are the principal. 
It is well to notice that great confusion exists in the 
synonyms of many of the species; for instance, Aspidium 
molle, which is a very cosmopolitan species, has no less 
than & dozen names placed under it as synonyms, some 
having erect and others decumbent vernation, which 
evidently marks them to be distinct species, but at the 
same time possessing no special marked difference in the 
character of the fronds. They present at least two very 
distinct modes of growth, one set having fasciculate verna- 
tion and another uniserial, thus forming two groups, which 
may be viewed as characteristic of two natural genera. 
Sect. 1.—EuNEPHRODIUM. 
Vernation fasciculate, decumbent or erect, in some arboroid. 
* Fronds linear lanceolate, entire or pinnatifid. 
Sp. N. Cumingianum, J. Sm. Bot. Voy. of Herald, Kunze, 
Fil., t. 9, fig. 2; N. stenopteris, Hook.; N. simplicifolium, 
- J. Sm., Hook., Second Cent. of Ferns, t. 19. (Polypodium 
sect. Goniopteris, Hook. Sp. Fil.) 
** Fronds pinnate. 
+ Pinne broad, serrated or entire, or sub-tripinnatifid, all or 
nearly all the venules anastomosing. 
Sp. N. acrostichoides, J. Sm. ; N. lineatum, Pr. ; N. gra- 
 nulosum, J. Sm. (v v.), Bot. Voy. of Herald (N. glandulo- 
sum, Hook. Sp. Fil.); N. cyatheoides, Kauf. (Polystichum ` 
