POLYPODIACEAE 



105 



1. Xiphopteris okuboi (Yatabe) Copel. Polypodittm 

 okiiboi Yatabe; Micropolypoditim o\uboi (Yatabe) Hayata; 

 Grammitis oktiboi (Yatabe) Ching; P. pseudotrichomanoides 



Hayata Okubo-shida. Rhizomes short, ascending, the 



scales membranous, brown, lanceolate, about 2 mm. long, 

 acute, entire; fronds tufted, erect to spreading, with reddish 

 brown spreading hairs about 1 mm. long; stipes short, 

 3-12(-15) mm. long; blades coriaceous, linear to linear-lanceo- 

 late, 2-12 (-25) cm. long, 3-6 mm. wide, acute to obtuse. 



gradually narrowed at base, pectinately pinnatiparted, the seg- 

 ments 8-30 pairs, obliquely spreading, oblong-ovate to nar- 

 rowly deltoid-ovate, 1-1.6 mm. wide, obtuse to subacute, en- 

 tire; costa and veins obscure; sori round to elliptic, about 1 



mm. across, solitary at the base of each pinna. Mossy rocks 



and tree trunks in mountains; Honshu (Kanto Distr. through 

 Tokaido to s. Kinki Distr.), Shikoku, Kyushu; rare. For- 

 mosa. 



13. LOXOGRAMME PresI Saji ran Zoku 



Small epiphytes; rhizomes creeping, dictyostelic, with ovate acuminate entire scales; fronds not jointed with the rhizome, 

 sessile or short-stiped, simple and entire, usually lanceolate to oblanceolate or linear, fleshy, glabrous, the main veins barely 

 evident, immersed, freely anastomosing; sori elongate, oblique in one row on each side of costa, commonly overlapping, super- 

 ficial or slighdy impressed, without paraphyses. About 40 species, Polynesia, Malaysia, Japan, Madagascar, and Africa, one 



species in Mexico and Central America. 



lA. Rhizomes very slender, 0.5-1 mm. across when dried; blades mostly under 10 cm. long, spathulate to linear-spathulate, very obtuse 

 to subacute 1. L. grammitoides 



IB. Rhizomes 1-2 mm. across when dried; blades 10-30 cm. long, oblanceolate to broadly linear, acuminate to acute. 



2A. Stipes slender, pale green to straw-colored 2. L, salicijolia 



2B. Stipes rather stout, purple-brown or black-purple toward base 3. L. saziran 



1. Loxogramme grammitoides (Bak.) C. Chr. Gym- straw-colored and narrowly winged stipe 2-10 cm. long, the 

 nogramme grammitoides Bak.; Poly podium grammitoides costa stout, slightly raised beneath, prominent above, the veins 

 (Bak.) Diels; Polypoditim ya\ushimae Christ; L. ya\ushimae hidden; sori usually on the upper half of blade, very oblique, 

 (Christ) C. Chr.; L. minor Makino Hime-saji-ran. midway between the costa and margin, usually slighdy over- 

 Small glabrous fern; rhizomes very slender, long-creeping, lapping or sometimes arranged nearly end to end in a single 

 0.5-1 mm. across when dried, the scales numerous, dense, row on each side of the costa, linear, 1-2 (-2.5) cm. long, 



membranous, linear-lanceolate, long-acuminate, dark brown, straight. Mossy rocks and tree trunks; Honshu (Awa 



entire, clathrate, about 1.5 mm. long; fronds remote, 4-10(-12) Prov. through Tokaido to Kinki Distr.), Shikoku, Kyushu. 



cm. long; blades spathulate to linear-spathulate, 5-10(-15) Korea (Quelpaert Isl.), Ryukyus, Formosa, China, Indo- 



mm. wide, somewhat fleshy, very obtuse to subacute, broadest china, and India. 



below the ape.N, entire or nearly so, the stipe very short and 3. Loxogramme saziran Tagawa. Gymnogramme in- 



indistinct; veins hidden; sori 1-6 on each side of the broadest voluta sensu Makino, non Hook.; L. fauriei sensu Ogata, non 



part of the blade, near the costa, oblong to linear-oblong, 1.5-2 Copel. Saji-ran. Stouter than the preceding; rhizomes 



mm. wide, very oblique. Mossy rocks in moimtains; Hon- long-creeping, scaly, 1.5-2 nun. across when dried, the scales 



shu, Shikoku, Kyushu. Formosa and China. rather firmly membranous, appressed to ascending, dark 



2. Loxogramme salicifolia (Makino) Makino. Gymno- brown, oblong-ovate to ovate-lanceolate, about 2 mm. long, 

 gramme salicijolia Makino; Polypodium ma\inoi C. Chr.; L. acuminate, entire, obsoletely clathrate, slightly longer and more 



malfinoi (C. Chr.) C. Chr.; L. jauriei Copel. Iwa-yanagi- distincdy clathrate at base of stipe; fronds 15-40 cm. long; 



SHiDA. Glabrous evergreen fern; rhizomes long-creeping, blades coriaceous, rather fleshy, narrowly oblanceolate, broad- 



densely scaly, 1-1.5 mm. across, the scales membranous, ovate est above the middle, acuminate or shordy caudate-acuminate, 



to ovate-lanceolate, about 2 mm. long, acuminate, those at base entire, gradually narrowed to the short and slightly flattened 



of the stipe oblong-lanceolate, about 3 mm. long, reddish purple-brown to dark-purple stipe; costa prominent on upper 



brown to brown; fronds distant, somewhat dimorphic, coria- side, the veins hidden; sori on upper half of blade, usually 



ceous, 10-30 cm. long; blades narrowly oblanceolate to broadly close together and overlapping, oblique, 1-3 cm. long, nearer 



linear, the sterile sometimes oblanceolate, 1-2.5 cm. wide, the the costa than the margin. Tree trunks in mountains; 



fertile slighdy narrower, entire, slighdy recurved on margin Honshu (Kanto Distr. and westw.), Shikoku, Kyushu. 



when dried, gradually narrowed to the slender pale green to China and Indochina. 



14. CTENOPTERIS Bl. 



KiREBA-OKUBO-SHIDA ZoKU 



Epiphytes; rhizomes short-creeping or erect, dictyostelic, densely scaly, the scales entire or ciliate; stipes fascicled, usually not 

 jointed with the rhizome; blades herbaceous to coriaceous, usually lanceolate, contracted at both ends, usually pectinately 

 pinnatisect to pinnate, setose or glabrescent; veins many in each pinnule, nearly always simple; sori dorsal or terminal on the 

 veins, round or elliptic, superficial to deeply immersed, without paraphyses. More than 200 species, in the tropics. 



1. Ctenopteris sakaguchiana (Koidz.) H. Ito. Poly- fronds with scattered, slender, spreading pale hairs; stipes slen- 



poditim sakaguchianum Koidz. Kireba-okubo-shida. der, 1-1.5 cm. long; blades firmly herbaceous, linear, 5-18 cm. 



Rhizomes very short, ascending, the scales minute, dark long, 5-8 mm. wide, obtuse to acute, pinnately divided; pinnae 



brown, ovate, about 0.5 mm. long, obtuse, sparsely ciliate; obliquely spreading, ovate to ovate-oblong, obtuse, decurrent 



