ICONES FILICUM SINICARUM 
PIEARE 257. 
LEPISORUS LEWISII (Baker) Ching 
POLYPODIACEAE 
LEPISORUS LEWIsII (Baker) Ching, Bull. Fan Mem. Inst. Biol. 4: 65 (1933). 
Polypodium Lewisii Baker, Journ. Bot. (1875) 201; C. Chr. Ind. Fil. 529 (1906); Takeda, Notes, 
R. Bot. Gard. Edinb. 8: 275 (1915). 
Rhizome rather thick, creeping, epigaeous, densely scaly; scales atratous, rigid, 
lanceolate-subulate from an ovate base, margin slightly erosed, luminae opaque, very 
narrow with thick walls, dark-colored, except the narrow margin, which is hyaline with 
clear elongate meshes; frond approximate, 6-9 cm long, or rarely longer, about 1.5 mm 
broad, rigid, linear, with strongly revoluted margin throughout the entire length of the 
lamina; texture rigid, color pale green; sori oblong-ovate, confined to the upper part, 
wholely or partly covered by the revoluted leaf-margin, which appears bead-like, due to 
the expanding sori. 
Kiangsi: Lu-Shan, Dr. Shearer (type), 1873. Chekiang: Sia-kan, Fan-chiao, 
R. C. Ching 3684, October, 1927. Anwhei: Whang Shan, K. K. Tsoong 3172. Kwang- 
si: San-feng, Chu-feng Shan, R.C. Ching 5926 (1928). Kwangtung: Lung-tau Shan, 
Kook Kiang, C. Wang 31652, Dec. 19, 1931. 
A peculiarly interesting little rock-dwelling fern with short, narrowly linear and 
strongly revoluted leaves, which appear bead-like due to the more or less concealed but 
expanding sori. All the specimens cited above are very uniform in all respects. It is 
found inhabiting the moss-clad cliffs in deep ravines or under dense forests, and proves 
to be the smallest known species of the genus. 
Plate 57. Fig. 1. habit sketch (natural size). 2. peltate paraphysis from a sorus (x 50). 3. scale 
from rhizome (x 50). 
