Ferns of British India and Ceylon. 41 



copiously pinnated groups with a distinct barren vein in the 

 centre, uniting one-third of the distance from the midrib to the 

 edge ; but only those of different groups joining one another ; 

 sori reaching nearly to the edge and copiously double. 

 Perak. In dense forests on Birch's Hill, {Day.) 

 (Also in the Malay and Polynesian Islands ; Queensland ; 

 Mascareen Islands ; Angola and Guinea coast.) 



1. Hemidictyum Ceterach. Chumba. {McDonnell.) 

 (Also in Afghanistan.) 



TRIBE Villa— SCOLOPENDRIEiE. 



Sori as in Asplenieae, except that the involucres are arranged 

 in pairs, and open towards each other. 



GENUS XLVIa.— SCOLOPENDRIUM. 

 Character of the tribe. 



1. Scolopendrium Delavayi. {Franchet). Rhizome short, 

 oblique, clothed with thickish lanceolate subulate scales ; stipes 

 3-4^ inches long, brown or blackish, glabrous, shining, slender ; 

 fronds green, pellucid, thin, entire, orbicular or suborbicular, 

 f-ij inch diameter, cordate at the base, the sinus opened or 

 closed, margin hyaline, no midrib, veins several times forked, 

 a few anastomosing towards the edge of the frond ; sori elongate, 

 not reaching the apex of the frond, indusium thinly membranous, 

 persistent. Franchet^ in Bull. Bot. Soc. France, 1885. 



North Munipore, 3,000-4000 feet. {Clarke, Wall.) Thibet, 

 on mountains near Tali. This species belongs to the sub-genus 

 Schaffheria, characterised by having no midrib, and the veins 

 anastomosing only at their apices. 



