CHARACTERS OF TRIBES AND GENERA. 221 



trade Catalogue of Mr. Stansfield, of Todmorden, no less 

 than 96 of these names are given under Polystichum aculea- 

 tum and angulare, and 66 under the British species of the 

 genus, Lastrea. 



113. ACROPHORUS, Presl (1836). 

 Aspidium Blume, Watt. ; Davallia Sp. Hook. 



Vernation fasciculate, erect, sub-arboroid. Fronds 4 to 6 

 feet high, stipate, deltoid, decompound multifid ; primary 

 pinnae opposite, 1 to H feet long, patent, their petioles 

 short, forming with the rachis a thickened node, and 

 furnished with a deciduous stipuliform scale ; ultimate 

 pinnules or segments sessile, J of an inch long, oblong, 

 oblique cuneiform, lobed or crenate on the upper edge. 

 Veins pinnate ; venules simple or forked, free, setulose 

 on the upper side. Sporangiferous receptacles terminal, 

 marginal. Sori punctiform, one, two, or three on each 

 segment. Indusium sub-orbicular, laterally attached by its 

 broad base on the inner side of the receptacle, at first 

 cucullate, but at length re flexed. 



Type. Aspidium nodosum, Blume. 



Illust. Presl, Tent. Pterid., p. 49, t. 3, f. 2. 



OBS. This genus is founded upon a remarkable Fern, a 

 native of India, Java, and other Malayan Islands. Like 

 many other Ferns, its habit alone is sufficient to mark it 

 as a distinct genus, but in venation and character of its 

 sori it differs but little from Lastrea, the principal difference 

 being in the form of the indusium, which is attached by its 

 broad base, as in the Eremobryos genus Leucostegia ; and 

 on that character alone Mr. Moore places the species of 

 Leucostegia under Acrophorus, in habit as two genera they 

 are, however, quite distinct. 



