322 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 of the 

 segments. It varies in the form of the frond, some being 

 nearly simple, others forked, which seems to show a relation- 

 ship with Asplenium septentrionale. 



It is a widely diffused species, found in many parts of 

 India, Ceylon, Arabia, Egypt, Abyssinia, southward to 

 Zambesi-land and Angola. 



182. DIPLORA, Baker (1873). 



Vernation uniserial, sarmentum slender, wire-like, scan- 

 dent. Fronds linear-ligulate, entire, 9 to 10 inches long, 

 |- 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. Indusiwn bivalved, one on each side 

 of the vein, linear, -narrow, margins conniving, enclosing 

 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. 



OBS. I have not seen this curious Fern, but learn from 

 Mr. Baker that it is a native of the Solomon islands, and 

 that the genus is founded upon a solitary frond, rising 

 laterally from about an inch of wiry-like caudex to which 

 it is attached by wnat appears to be a joint. As it cannot 

 be well associated with any Erymobryous genus, I therefore 

 for the present place it in Aspleniece, with which it agrees 

 in the general asplenoid habit, but is peculiar in having a 

 double indusium to each receptacle. 



*Sp. As above. 



