ICONES FILICUM .SINICARUM 
PLATE 99 
POLYPODIUM AMOENUM Wallich 
BOT NOD TSC EaE 
POLYPODIUM AMOENUM Wallich, Catal. n. 290 (1828); Mett. Polyp. 80, n. 131 (1875); Hk. 
et Bak. Syn. Fil. 341 (1868); Diels, Nat. Pfl. Fam. 1: 4, 311 (1899); C.Chr. Ind. 
508 (1906). 
Goniophlebium amoena J. Sm. in Hooker, Gen. Fil. ad t: 50 (1840); Bedd. Ferns Brit. Ind. t. 
5 (8165); Handb. Ferns Brit. Ind. 317 (1883). ‘ 
Marginaria amoena Presl, Tent. Pterid. 188 (1816). 
Polypodium valdealatum Christ, Bull. Herb. Boiss 7: 4 (i899). 
Polypodium amoenum var. latedeltoidewm Christ, Bull. Acad. Géogr. Bot. (1907) 142. 
Polypodium subamoenum var. chinensis Christ, Nuovo Giorn. Bot. Soc. Ital. n.s. 4: 99 (1897), 
Polypodium Bonatianum Brause, Hedwigia 54: 207 pl. 4. f. L (1914). 
Polypodium yunnanense Franch. Bull. Soc. Bot. France 32: 29 (1885). 
Polypodium Duclouxii Christ in Lecomte, Not. Syst. 1: 14 (1909). 
Polypodium amoenum var. pilosa Clarke, Journ Linn. Soc. 24: 417. (1888). 
Polypodium amoenum f. pilosa Rosenst. in Fedde, Report. Sp. Nov. 18: 134 (1914). 
Rhizome wide-creeping, rather thick, hypogaeous or subepigaeous; scales fusco- 
brown, thin, clathrate, broadly ovate-acuminate; frond far apart, stipe 12-30 cm long, 
firm, erect, naked, straminous, lamina 25-40 cm long, 10-20 cm broad, pinnatifid nearly 
to the rachis into 15, or more, pairs of spreading acuminate, close segments, with more or 
less distantly serrate margin; the lowest not shortened, slightly deflexed; texture charta- 
ceous, lustrous green, scaly on rachis beneath, naked, or often more or lesss shortly pilose 
on both or one side; veins distinct on both surfaces, areolae uniseriate along the costa, or 
rarely imperfectly biseriate in broader segments; sori medium-sized, far apart, nearer to 
the costa than to the margin, naked. 
Type from Nepal (leg. Wallich). A very common fern in the Himalayas as 
well as in Southwestern and Central China, extending northwardly to the southern 
part of Shensi. P. subamoenum var. chinense Christ is a reduced form common in 
North China and the Lower Yangtze Valley; P. yunnanense Franch. is the same 
form with lamina more or less pilose on one or, not infrequently, on both sides, and to 
this P. Bonatianum Brause and P. amoenum f. pilosa Rosenst. should be referred as 
direct synonyms. Polypodium valdealatum Christ, based upon Aug. Henry n. 11315 from 
Mengtze, Yunnan, differs from the type only in segments provided with gross teeth; 
P. Duclouxii Christ differs in stipe and lamina being tinged wine-red when dried. 
Plate 99. Fig. 1. habit sketch (natural size). 2. scale from rhizome (X50). 
