206 CHARACTERS OF TRIRES AND GENERA. 
tinguish it from Aspidiwm. Setting aside its simple 
anastomosed venation, and viewing it in its general aspect 
only, it appears to be related to Lastrea villosa, than which, 
however, it assumes a more aboreous character. Its most 
natural affinity is with Aspidiwm macrodontum and A. gigan- 
teum. It is a native of India, Malay, Philippine, Fiji, and 
other islands. 
Sp. P. Leuzeana, Presl, Bedd. F. Brit. Ind., pl. 134. 
Oss.—In the “Species Filicum” four species are placed 
under the section Pleocnemia of Nephrodiwm, two of which 
possess no natural relationship with P. Leuzeana ; and I am 
inclined to consider the fourth species, N. (Pleocnemia) 
excellens identical with the original species, though Presl 
makes a distinct genus of it (Proferea). 
108.—Nernropium, Schott. (1834). 
Aspidium sp., Sw.; Nephrodiwm sect, Eunephrodium, Hook. 
Sp. Fil. 
Vernation fasciculate, decumbent or erect, acaulose or sub- 
arboroid, or uniserial sarmentose, Fronds 1 to 6 feet high, 
simple or pinnate; pinne entire, sinuose or pinnatifid. 
Veins costeeform, pinnate ; the lower pair of venules only, 
or more, or the whole, angularly anastomosing, producing 
from their junction an excurrent veinlet, which is either 
free or anastomose in the angle of the next superior pair. 
Receptacles medial or sub-terminal. Sori round, Indusium 
reniform, rarely nearly orbicular. 
Type. Aspidium molle, Swartz. 
Illust. Schott Gen. Fil, t. 22; Hook. and Bauer, t. 48, 
B; Moore Ind. Fil., p. 70, B; J. Sm. Ferns, Brit. and 
For., fig. 65; Hook. Syn. Fil., t. 5, fig. 44, a, b. 
Oss.— This genus as originally characterised embraced ` : 
