Re CHARACTERS OF TRIBES AND GENERA, 
referred to Blechnum by Presl, and to Pteris by Mettenius, 
but according to my view the blechnoid or pterioid character ` ` 
of the sori is entirely consequent on the narrowness ofthe ` 
segments, It varies in the form of the frond, some being 
nearly simple, others forked, which seems to show a relation- 
ship with Aspleniwm septentrionale. 
It is a widely diffused species, found in many parts of 
India, Ceylon, Arabia, Egypt, Abyssinia, southward to ` 
Zambesi-land and Angola. 
182.—Drretora, Baker (1873). 
Vernation uniserial, sarmentum slender, wire-like, scan- — — 
dent. Fronds linear-ligulate, entire, 9 to 10 inches long, E 
i-inch broad, obscurely crenate-repand, membranous, smooth, 
stipes short, articulate with the caudex. Veins distinct, 
patent, usually simple, sporangiferous along their centre, ` 
their whole length. Indusiwm bivalved, one on each side 
of the vein, linear, narrow, margins conniving, enclosing P 
the sporangia, forming numerous contiguous sausage-like ` 
sori. | 
Type. D. integrifolia, Bak. in Journ. Bot., new series, 2: 
p. 235, with figure ; Append. Syn. Fil., p. 492. ; 
Oss.—I have not seen this curious Fern, but learn from ` 
Mr. Baker that it is a native of the Solomon islands, a 
that the genus is founded upon a solitary frond, rising. 
laterally from about an inch of wiry-like caudex to whi 
it is attached by what appears to be a joint. As it cannot 
be well associated with any Erymobryous genus, I therefore 
for the present place it in Aspleniew, with which it agrees 
in the general asplenoid habit, but is peculiar in bating 
dambis indusium to each receptacle, 
. Sp. As above. 
