266 CHAEACTERS OF TRIBES AXD GEXEEA. 



Microlepia adiantoides, and that again with several species 

 of Dennstcedtia, a gradual transition is seen to connect all 

 these genera. 



Sp. D. prolifera (Eoolc. and Grev., t. 15i ; Fil. Exot., t. 

 82) (v V.) ; D. concinna {Pr.) (D. Matthewsii, Hoolc. Sp. 

 Fil., 1, t. 30, B ). 



Obs. — The latter species is a native of Peru. In the 

 " Synopsis Filicnm " another species is described, namely, 

 D. Moorei, which, although agreeing in having an exserted 

 cup-like indusium, is nevertheless quite distinct in habit 

 and venation. In this work it is characterised as a genus 

 nnder the name of Trichiocarjm. 



Tribe 18.— LINDS^E^. (Plate 18.) 



Yernation sarmentose, slender, elongated, or short and 

 oaespitose. Sort marginal, linear, continuous or interrupted, 

 binate or punctiform. Special indusium plane, attached on 

 the interior side, equal with, or shorter than the indusasform 

 margin, forming a marginal groove, or bilabiate cyst, 

 open exteriorly. 



Obs. — A very interesting tribe of Ferns, in many res- 

 pects similar in habit to Adiantiim, but readily distinguish- 

 able by the indusium being attached on the interior side of 

 the receptacle, and open exteriorly. This character, 

 however, is not sufficient of itself for technically distin- 

 guishing Lindsceem from the tribe Saccolomece, but their 

 distinct habit marks them as representing a separate 

 group. 



About sixty species are described in the " Species 

 Filicum," which in the " Synopsis " are reduced to forty- 

 eio-ht ; from that number I exclude the species constituting 



