132 CHARACTERS OF TRIBES AND GENERA. 
segments more or less contracted; venules evident, con- 
tiguous, forming a concrete amorphous receptacle, some- 
times forming moniliform spikes. 
Type. Acrostichum appendiculatum, Willd. 
Illust. Schott. Gen. Fil., t. 85; J. Sm. Ferns, Brit. and 
For., fig. 35; Hook. Syn. Fil., t. 7, fig. 60, h., i., j. 
Ozs.—The species forming this genus are natives of the 
Eastern hemisphere, and were originally included by most 
authors under Polybotrya; but as they do not well asso- 
ciate in habit with the original species of that genus, I 
therefore adopt Schott’s genus Egenolfia. At least eight 
species have been described as belonging to this group, but 
after comparing specimens representing the different 
species, the greater number of them seem to me to be only 
different forms of one or two, or at most three, species. 
The chief difference is in the pinne, which are entire or 
more or less laciniated, and the whole seem to run into 
one another. 
Sp. E. asplenifolia (Bory); E. appendiculata (Willd: 
(v v.); E. bipinnatifida, J. Sm. (A. appendiculata var., 
costulata, Hook. sp. Fil.). 
Oss.—The regular bipinnatifid character of the fronds 
and their great length seems to mark the last as a 
distinct species. 
48.—Porrsorrya, H. B. K. (1810). 
Acrostichum, Hook. Sp. Fil. 
Vernation uniserial, sarmentum thick, elongating, scan- 
dent, epiphytal, squamose. Fronds pinnate or bi-tripinnate, 
2 to 4 feet long, glabrous, rarely villose. Veins pinnate, — 
venules free. Fertile segments pinnatifid or — 
convolute, wholly sporangiferous. : 
