98 



FERNS I BRITISH AND FOREIGN. 



pinnatifid, generally membranous, flaccid, 1-3 feet long. Veins 

 compound anastomosing ; primary veins costaeform, elevated or 

 internal, generally flexuose, sometimes obsolete. Receptacles 

 compital, superficial. Sori round, or by confluence oblong or 

 linear, irregular or obliquely 1-2-serial. 



1. C. membranacea, J. Sm. Polypodium membranaceum, 

 Don. Polypodium hemionitideum, Wall. ; Lowe's 

 Ferns, 2, i 7. Colysis hemionitidea, Presl. ; Fee. 

 Hemionitis plantagiuea, Don. Polypodium gran- 

 difolium, Wall. East Indies. 



2 C. Spectra, J. 8m. Polypodium spectrum, Kaulf. Poly- 

 podium Thouinianum, Gaud, in Freyc. Voy. Sot. t. 5, 

 /. 1. Sandwich Islands. 



25. MICROSORUM, Link ; Fee. 



Rhizome short, subhypogeous. Fronds simple, entire or 

 irregularly sinuose, coriaceous, smooth, 1-3 feet long 



Genus 25. Portion of mature froud, upper side. No. l. 



compound anastomosing, internal ; primary veins obscure. 

 Receptacles compital, superficial. Sori round, small, numerous, 

 irregular, sometimes subconfluent. 



1. M. irioides, Fee. Polypodium irioides, Poir.; Hook, et 

 Grev. Ic. Fil. t. 125. Hook. Fil. Exot. t. 4. Poly- 

 podium polycephalum, Wall. Microsorum irregulare, 

 Link ; Fee. Microsorum sessile, Fee. j3 apex of 

 fronds crested. East Indies, Malayan Archipelago, 

 Australia, and Trinidad. 



