98 
FERNS : 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, •/. Sm. Polypodium membranaceum, 
Don. Polypodium liemionitideum, Wall. ; Lowe's 
Ferns, 2, t. 7. Colysis bemionitidea, Presl. ; Fee. 
Hemionitis plantaginea, Don. Polypodium gran- 
difolium, Wall.— East Indies. 
2 C. Spectra, J. Sm. Polypodium spectrum, Kaulf. Poly- 
podium Thouinianum, Gaud, in Freyc. Voy. Bot. t. 5, 
f. 1 . — Sandwich Islands. 
25. MICROSORUM, Link; Fee. 
Rhizome short, subhypogeous. Fronds simple, entire or 
irregularly sinuose, coriaceous, smooth, 1-3 feet long Veins 
Genus 25. — Portion of mature frond, upper side. No. 1. 
compound anastomosing, internal ; primary veins obscure. 
Receptacles compital, superficial. Sori round, small, numerous, 
irregular, sometimes subconfluent. 
1. M. irioid.es, Fee. Polypodium irioides, Foir. ; Hooli. ct 
Grev. Ic. Fil. t. 125. Hook. Fil. Exot. t. 4. Poly- 
podium polycaphalum, Wall. Microsorum irregulare, 
Link ; Fee. Microsorum sessile, Fee. — /3 apex of 
fronds crested. — East Indies, Malayan Archipelago, 
Australia, and Trinidad. 
