CHARACTERS OF TRIBES AND GENERA. 239 



Hook. Sp. Fit. 1, t. 21 A. ; W. Peruviana, Hook. 82). Fil. 1, 

 t. 21 B. ; W. incisa, Gillies, Hook, and Grev. Ic. FiL, 

 L 191. 



OBS. The two first are natives of Great Britain, chiefly 

 found in Scotland and Wales, but rare. 



127. DIACALPE, Blume (1828). 

 Hook. Sp. Fil 



Vernation fasciculate, acaulose. Fronds 2 to 3 feet high, 

 stipate deltoid, decompound multifid ; primary pinnae alter- 

 nate ; ultimate pinnules small, J-inch in length, linear, 

 obtuse, oblique, cuneate at the base. Feins simple or 

 forked, free and clavate. Sporangiferovs receptacles medial, 

 punctiform. Indusium globose, calyciform, opening irregu- 

 larly, attached by a small point, including the sporangia, 

 forming a sessile sorus. 



Type. Diacalpe aspidioides, Blume. 



Illust. Hook, and Bauer Gen. Fil., t. 99 ; Moore Ind. Fil., 

 p. 81, fig. 1 to 4 ; Hook. Syn. Fil., t. 1, fig. 7. 



OBS. This genus consists of one species only, native of 

 Java, Assam, and Moulmein. In general habit it resembles 

 some of the multifid species of Lastrea and PolysticJmm. 

 Its complete globose cup indusium is similar to the section 

 Physematium of Woodsia, as also to the following genus 

 Peranema, differing only in the sori not being pedicellate ; 

 this, however, is more apparent than real, for in reality 

 there is a slightly elevated point in Diacalpe, off which the 

 entire sorus can be freely removed without rupturing the 

 indusium or disturbing its sporangia. 



Sp. D. aspidioides, Blume. 



