ICONES FILICUM SINICARUM 
PLATE 88 
MICROSORIUM MEMBRANACEUM (Don) Ching 
POLY PODIACEAE 
MICROSORIUM MEMBRANACEUM (Don) Ching, Bull. Fan Mem. Inst. Biol. 4: 309 (1933). 
Polypodium membranaceum Don, Prod. Fl. Nepal. 2 (1825); Mett. Polyp. n. 235 (1857); Hk. et 
Bak. Syn. Fil. 360 (1868); Christ, Farnkr. d. Erde 105 (1897); C. Chr. Ind. Fil. 544 (1906); 
Ogata, Ic. Fil. Jap. 2: pl. 88 (1920). : 
Pleopeltis grandifolia Bedd. Ferns S. Ind. t. 177 (1864); Christ, Bull. Herb. Boiss. 6: 874 (1898). 
Pleopeltis membranacea Moore, Ind. Fil. 191 (1857); Bedd. Handb. Ferns Brit. Ind. 355 (1883) 
Rhizome creeping, thick, fleshy, over 6 mm across, subhypogaeous or epiphytic, 
densely scaly; scales fusco-brown, thin, clathrate, broadly lanceolate, acuminate, suben- 
tire; frond subcaespitose or approximate, very broadly lanceolate, 6-14 cm broad, 30-50 
cm long, acnminate, gradually attenuate down to the base of the winged and rather 
sharply carinate, herbaceous stipe, margin entire or somewhat wavy; texture thin 
herbaceous, green on both sides, rachis sharply ridged on lower part underneath, lateral 
main vers wide apart, distinct near to the margin, intervening veinlets conspicuous, 
areolae large with divaricated including veinlets; sori small, irregularly disposed between 
main veins, mostly compital, naked. 
In China, numerous specimens have been examined from provinces Yunnan, 
Kweichow, Kwangsi, Kwangtung. It ranges from Ceylon, whole of India, Indo-China, 
Southwestern China, Formosa to the Philippines. 
Plate 88. Fig. 1. habit sketch (natural size). 2. portion of a frond, showing venation and posi- 
tion of sori (X 3). scale from rhizome (X50). 4. créss section of the lower part of a stipe (X20). 
