ICONES FILICUM SINICARUM 
PLATE 108 
COLYSIS DIGITATA (Baker) Ching 
POLYPODIACE 
COLYSIS DIGITATA (Baker) Ching, Bull. Fan Mem. Inst. Biol. 4: 328 (1933). 
Gymnogramme digitata Baker, Journ. Bot. (1890) 267. 
Polypodium digitatum C. Chr. Ind. Fil. 522 (1905). 
Grammitis Finlaysoniana Wall. List 248, No. 776 (1829, nom. nud.). 
Selliguea Finlaysoniana Moore, Ind. Fil. LXVL (1857); Christ, Journ. Bot. d. France 2°. sér. 1: 1 
(1908) 
Gymnogramme Finlaysontana Baker, Ann. Bot. 5: 486 (z891). 
Colysis tridactylis Fée, Gen. Fil. 176 (1850-52, nom. nud.). 
Polypodium annamense Christ, Journ. Bot. d. France 19: 77 (1905); C. Chr. Ind. Fil. 508 (1906); 
Merr. Enum. Hainan Pl. in Lingnan Sci. Journ. 5: 18 (1927). 
Polypodium ampelidium Christ, l.c. p. 78; C. Chr. l.c.; Merr. Le. p. 17. 
Poly podium podopterum Christ, l.c. p. 125; C. Chr. Le. 555. 
Poly podium Cadieri Christ, l.c. p. 75; C. Chr. lc. p. 515. : 
Rhizome wide-creeping, copiously clothed in lanceolate hair-pointed atro-brown 
and clathrate thin scales; fronds subdimorphous, I-3 cm apart, stipe 20-30 cm long, pale 
straminous, naked, base articulated, lamina 10-18 cm each way, generally palmately divid- 
ed (sometimes 2-3-lobed or simple), base rarely shortly decurrent, segments 3-5, lanceolate, 
acuminate, 10-16 cm long, I.5-3 cm broad, base somewhat narrowed, margin thickened, 
entire but repandulous; texture chartaceous, glabrous on both sides, pale green; lateral 
veins oblique, flexuose, visible; sori linear, oblique, between lateral main veins, extending 
from costa to margin; sterile frond conform, but on much shorter and often winged stipe 
and with broader segments. 
Kwangsi: Lungchow, Morse 45; Lu-chen Hsien, R, C. Ching 5620, on rocks along 
stream under forest. Hainan Island: Lea Mui, Eryl Smith 1513, Jan. 4, 1923, on stream 
side; South of Fan Ta, Tsang Wat-tak 17797 (1929); Five Finger Mt., F. A. McClure 8080, 
8552; W. Y. Chun 6804 (in Herb. Univ. Nanking); Evyl Smith 2542 (£. simplex), on tree; 
Hoichow, Hancock 20; Lin-fa Shan, F. A. McClure 8070; Tsang Wai-tak 17024, 15839; 
W. Y. Chun 6605; Pat Ka Shan, F. A, McClure 8552 (£. simplex); Tun Kao, Eryl Smith 
1510, 1518, 1511; Huploha, W. Y. Chun 1316; Lohe, Miss Moninger 225. 
Tonkin: Balansa 102 (type); Lang Biang, Eberhardt 106; Gaudichaud; Mrs. Clemens 
4365. Annam: Cadier 45 (type of Polypodium annamense); Cadier 103 (type of P. 
Cadiert). 
A very distinct and pretty fern, now found to be fairly common in the localities 
noted, but still unknown elsewhere. It differs from the other species of the genus in its 
palmatifid leaves with 3-4-5 lanceolate entire segmeuts and wingless stipe, but forms with 
2-3-lobed or even simple leaves have also been found not uncommon even in the same collec- 
tion or on the same rhizome. Polypodium annamense Christ differs only in the slightly 
winged upper stipe, while P. Cadieri Christ has simple or 2-3-lobed leaves with much con- 
tracted linear fertile segments. 
Plate 198. Fig. 1. Habit sketch (natural size). 2. Portion of fertile segment, showing venation 
and position of sori (x 3). 3. Sporangium (x 108). 4. Scale from rhizome ( 36). 5. Cross section of 
rhizome, showing the arrangement of steles (x 20). 
