48 



Davalliaceae; Plagiogyriaceae 



1. DAVALLIA J. E. Smith Shinobu Zoku 



Epiphytic; rhizomes elongate, with peltate ciliate scales; stipes interrupted, jointed at the base; blades firm to rigidly 

 coriaceous, deltoid to narrowly ovate, uniform or subdimorphic, mostly decompound and rather finely dissected, mosdy glabrous, 

 the ultimate rachises winged; veins free, sometimes terminating in the cartilaginous margin; sori terminal; indusia fixed by 



the base and sides, somewhat elongate. About 40 species, Adantic Islands, S. Africa, Madagascar, abundant in s. Asia and 



Polynesia. 



1. Davallia mariesii Moore. D. bullata sensu auct. Ja- 



pon., non Wall. Shinobu. Rhizomes long-creeping, 



rather stout, densely scaly, 4-5 mm. across, the scales brown, 

 membranous, linear-lanceolate, 6-7 mm. long, about 1 mm. 

 wide near base, long-acuminate, ciliate, scarious-margined; 

 fronds deciduous, glabrous; stipes 8-13 cm. long, slender, 

 jointed at base, smooth, light-green, sometimes reddish, with 2 

 lines on upper surface; blades broadly ovate-deltoid, 15-20 cm. 

 long, 10-15 cm. wide, short-acuminate, 3- or 4-pinnatiparted, 

 the rachis with pale brown peltate scales 2-3 mm. long while 



young; pinnae ovate-oblong, subacute, short-pedolulate, the 

 lowest ones largest,, ovate-deltoid, 7-12 cm. long, dilated on 

 posterior side; pinnules oblong to oblanceolate, 1-2.5 mm. 

 wide, subobtuse, entire or 2- or 3-lobulate at the tip; veins usu- 

 ally once, sometimes twice forked, or simple; indusia obovate, 



hyaline, about 1.5 mm. long, solitary on the pinnules. 



Aug.-Oct. Rocks and tree trunks in mountains; Hokkaido 

 (Oshima Prov.), Honshu, Shikoku, Kyushu. Korea, For- 

 mosa, and China. 



2. HUMATA Cav. Kiku-shinobu Zoku 



Epiphytic; rhizomes long-creeping, covered with appressed peltate scales; fronds coriaceous, interrupted, jointed at base with 

 the rhizomes, simple and lanceolate or pinna tely dissected and usually deltoid, glabrous; veins free, often very broad; sori 



terminal on the veins, usually submarginal; indusia rounded to broadly reniform, attached at base and sometimes laterally. 



About 50 species, in Malaysia and Polynesia to the Himalayas and Madagascar. 



1. Humata repens (L. f.) Diels. Adiantum repens L. f.; 

 Davallia repens (L. f.) Kuhn; D. pedata Smith; D. chrysan- 



themifolia Hayata Kiku-shinobu. Evergreen; rhizomes 



long-creeping, wiry, 2-2.5 mm. across inclusive of the scales; 

 scales brown, chartaceous, slightly lustrous, gradually nar- 

 rowed at the tip, 4-5 mm. long, about 1 mm. wide, with a 

 ciliate, hyaUne, membranous margin; fronds 3-20 cm. long; 

 stipes 1-12 cm. long, firm, pale green to pale brown, sparsely 

 scaly; blades coriaceous, deltoid-ovate to narrowly so, 2-10 

 cm. long, 1.5-5 cm. wide, obtuse to acuminate, pinnate, gla- 



brous, the veins on lower side flat, translucent, the rachis flat, 

 with scattered ovate-peltate ciliate scales while young; pinnae 

 few, oblong to lanceolate, obtuse, sessile or adnate at base, 

 the sterile ones crenately toothed to subentire, the fertile ones 

 dentate, the lowest usually dilated and pinnately lobed to 

 parted on the posterior side; veins ascending; sori inserted 

 in the sinus of the teeth; indusia orbicular or broadly elliptic, 



attached at base, about 0.7 mm. wide. On rocks; Honshu 



(s. Kinki Distr.), Shikoku, Kyushu. Ryukyus, Formosa, 



China, India, Mascarene Isls. to Polynesia, and Australia. 



3. NEPHROLEPIS Schott Tama-shida Zoku 



Terrestrial, usually stoloniferous ferns; rhizomes erect, short, scaly; fronds tufted, scaly, often hairy to glabrescent, simply 

 pinnate; pinnae jointed on the rachis; veins free; sori terminal on the veins, dorsal or marginal; indusia fixed by a point or 

 along the base. ^Pantropic, with about 30 species. 



1. Nephrolepis auriculata (L.) Trimen. Polypodium 



auriculaium L.; N. cordifolia sensu auct. Asiatic, non Presl 



Tama-shida. Evergreen; rhizomes short, ascending, covered 

 with the persistent stubs of old stipes; stolons wiry, with a few 

 globose densely scaly tubers, the scales thinly membranous, 

 pale brown, linear-lanceolate, 7-10 mm. long, about 1 mm. 

 wide, filiform at the tip, sparsely ciliate; fronds glabrous, 

 tufted; stipes short, 5-10 cm. long, 2-3 mm. wide, nearly terete, 

 the scales prominent, rounded, long-ciliate; blades linear-lance- 

 olate to broadly linear, 25-50 cm. long, 3-6 cm. wide, narrowed 

 at both ends, simply pinnate; pinnae many, spreading, nar- 



rowly oblong, 5-7 mm. wide, obtuse, appressed-toothed, sessile, 

 rounded to subtruncate on posterior side at base, triangularly 

 auriculate and subcordate on anterior side at base, the lower 

 pinnae broader and shorter, oblong to elliptic, rounded at the 

 tip; sori submarginal or nearly median between the costa and 

 the margin; indusia obliquely reniform, attached at base, en- 

 tire, about 1 mm. wide. ^Thin woods and roadsides in hills 



near the sea; Honshu (Izu, Kii, and Nagato Prov.), Shikoku, 



Kyushu; locally common. Ryukyus, Formosa, China, and 



generally throughout the Tropics and subtropics of the Old 

 World. 



Fam. 15. PLAGIOGYRIACEAE Kiji-no-o Ka Plagiogyria Family 



Terrestrial, glabrous, scaleless; rhizomes short, erect, symmetrical, dictyostelic; stipes crowded, enlarged at base, triangular in 

 cross section, with a double row of glandlike pneumatodes; blades herbaceous or coriaceous, pinnatifid to pinnate, glabrous, 



somewhat dimorphic; pinnae of the fertile blades narrow; veins forked, free except in the sorus. A single genus with more 



than 20 species. New Guinea to the Himalayas and e. Asia, also in Central and S. America. 



lA. Sterile and fertile pinnae short-petiolulate except for the few upper ones 1. P. euphlebia 



IB. Sterile pinnae sessile, the fertile sessile or short-petiolulate. 



