ICONES FILICUM SINICARUM 
PLATE 104 
DAVALLIA ORIENTALIS C. Christensen 
POLYPODIACEZ: 
DAVALLIA ORIENTALIS C. Christensen ex Wu, Bull. Dept. Biol. Sun Yatsen Univ. No. 
3: 104 t. 43 (1982); No. 6: 4 (1933); Ind. Fil. Suppl. III. 68 (1934). 
Davallia elegans Hk. (non Sw, 1801) Florul. Hongk. in Journ. Bot. (1857) 333; Syn. Fil. 95 
(1867); Benth. Fl. Hongk. 461 (186r). x : 
Davallia divaricata Christ (non Bl. 1828), Bull. Soc. Fr. et Belg. 28: 260 (1898); Dunn & Tutch. 
te Kwangt. & Hongk. 337 (1912); Merr. Enum. Hainan Pl. in Lingnan Sci. Journ. 5: 11 
1927). 
Davallia denticulata Merr. 1.c. (non Mett. 1867). 
Rhizome thick as a small finger, fleshy, wide-creeping, densely clothed in 
bright brown lanceolate scales to 1 cm long or longer; frond far apart, stipe gla- 
brous, brown, terete below, deeply bisulcate above, 30-60 cm long, 4 mm thick at 
the base, lamina ample, 60-90 cm each way, deltoid, 4-pinnate or 5-pinnatifid; 
pinne about 10-jugate, alternate, long-petiolate, the basal ones much the largest, 
deltoid, 20-30 cm long, 12-18 cm broad, acuminate, the upper ones gradually smal- 
ler, the middle ones broadly lanceolate, 15 cm long, 6 cm broad, with about 10 
pairs of pinnules, which are petiolulate, the anterior basal one much the largest, 
deltoid, acuminate, the others smaller with unequal base; pinnules of 2nd. order 
sessile, 1-1.5 cm long, pinnatifid into elongate denticulate segments; texture rigi- 
dulously coriaceous, glossy; veinlets in the segments oblique, one to each tooth; 
sori submarginal, one to each tooth, indusium tubular, twice as long as broad, apex 
truncate, with projecting teeth above. 
Hainan: Yih Tsoh Mao, F. A. McClure 9717 (type); Nodoa, Lin Fa Ling, 
W.Y. Chun 1799; McClure 7919; Five Finger Mt., McClure 8463, 8678; Hung Mo 
Shan, W. 7. Tsang 17771. Kwangtung: Man Sei Ho, 7'utcher10505; Lohfau Shan, 
C. Ford (1883); N. K. Chun 41276; Swatow, Dalziel, Sept. 1899. Hongkong: Cham- 
pion 552; Matthew 72 (1905); May 18, 1904; April 12, 1907; C. Wright (1853-56): 
Lantao Island, C. L. Tso (1929); Borther (1856); Alexander. Kwangsi: Yao Shan, 
S. 8. Sin 3698, Sept. 26. 1928, Lin-yen Hsien, outside of the south city gate, R. C. 
Ching 6665, 6761; Seh Fang Dar Shan, on the border of Tonkin, R. C. Ching 1860. 
Yunnan: Szemeo, Henry 13141. 
Tonkin: Mt. Bana, Clemens 3855; environs de Chobo, Pételot, April 14, 1926; 
Chapa, Pételot 3306; Cao-Bang, Pételot 2740; Billet 4182; Bon 3257. 
The present species has hitherto been generally considered as identical with 
the Malesia-Polynesian D. divaricata Bl. from which it differs in thinner leaves, 
greenish color, even when dried, much longer and more ascending soriferous vein- 
lets and in longer, narrower indusium with exerted sterile margin as high as the 
sorus itself. 
Swartz cited Canton as the type locality for his D. elegans (Syn. Fil. pp. 132, 
347), but this is certainly wrong, for his species, actually based upon Thunberg’s 
plant from Java, agrees exactly with D. denticulata of Malesia-Polynesia, not 
known from China. The same mistake was since repeated by Hooker, Bentham 
and other authors on the flora of South China. 
Plate 104. Fig. x. Habit sketch (natural size). 2. pinnule of 2nd. order (x 8). 3. Sorus, with 
part of indusium removed (x 25). 4. Scale from rhizome (x 12). 
