POLYPODIACEAE 



lowlands and low mountains; Hokkaido, Honshu, Shikoku, 



Kyushu ; common. Korea, Formosa, China, Indochina, and 



Philippines. 



2. Pleopeltis onoei (Fr. & Sav. Okuyama. Polypodittm 



onoei Fr. & Sav.; Lepisorns onoei (Fr. & Sav.) Ching 



HiME-NOKi-SHiNOBu. Rhizomes long-creeping, slender, 

 about 1 mm. across, radier densely scaly, the scales appressed, 

 lanceolate, 2.5-3 mm. long, acuminate, dark brown, slightly 

 paler toward the margin, rounded to obscurely lobed at base; 

 fronds evergreen, remote, 3-7 cm. long, 2-5 mm. wide, gla- 

 brous; stipes 2-7 mm. long; blades coriaceous, linear to linear- 

 spathulate, 2-5 mm. wide, mosdy broadest below the rounded 

 or very obtuse apex, the margins very slighdy recurved, en- 

 tire, deep green above, paler beneath; costa slender, the veins 

 invisible; sori few, on upper portion of the blade, median, 

 round. Mossy rocks and tree-trunks in mountains; Hok- 

 kaido, Honshu, Shikoku, Kyushu; rather common. Korea. 



3. Pleopeltis uchiyamae (Makino) Ohwi. Polypodium 

 uchiyamae Makino; Lepisorus uchiyamae (Makino) H. Ito 



Ko-URABOSHi. Rhizomes slender, creeping, about 2 



mm. across, rather densely scaly at least toward tip, the scales 

 rather thin, clathrate, ascending to obliquely spreading, lan- 

 ceolate, (2-)2.5-3 mm. long, acuminate-attenuate, rounded to 

 cordate at base, toothed; fronds evergreen, remote, 5-15 cm. 

 long, glabrous; stipes 3-6 cm. long; blades thinly coriaceous, 

 narrowly lanceolate to broadly linear, 5-10 cm. long, 3-5 mm. 

 wide, usually rather abruptly narrowed at both ends, the mar- 

 gins very slighdy recurved, entire, paler beneath; costa raised 

 on both sides or often scarcely so above, the veins invisible; 



sori round, on upper part of blade. Rocks near seacoast; 



Honshu (Tokaido and s. Kinki Distr.), Shikoku, Kyushu; 

 rare. Ryukyus. 



4. Pleopeltis clathrata (C. B. Clarke) Bedd. Polypo- 

 dium clathratum C. B. Clarke; Lepisorus clathratus (C. B. 

 Clark) Ching; Polypodium papa\ense Masam.; L. clathratus 

 var. namegatae Kurata; Pleopeltis clathrata var. namegatae 



(Kurata) Ohwi Toyoguchi-uraboshi. Rhizomes creeping, 



densely scaly, 1-1.5 mm. across, the scales deep brown, mem- 

 branous, lanceolate or ovate-lanceolate, 3-5 mm. long, 1-1.5 

 mm. wide, acuminate, clathrate with large oblong thin cells, 

 rounded and peltate at base, with few slender teeth; stipes 1-4 

 cm. long, straw-colored, glabrous; blades lanceolate or Hnear- 

 lanceolate, 5-15 cm. long, 6-15 mm. wide, gradually narrowed 

 at both ends, entire or slighdy undulate, pale green, glabrous, 

 thinly dispersed with small scales while young, the costa dis- 

 tinct, raised below; sori slighdy nearer the costa than the 



margin. Honshu (Shinano Prov.) ; rare. Formosa, 



China, and n. India to Siberia. 



5. Pleopeltis ussuriensis Regel & Maack var. distans 

 (Makino) Okuyama. Polypodium lineare var. distans Ma- 

 kino; Polypodium distans (Makino) Makino; Polypodium 

 annul frons var. distans (Makino) Nakai; Polypodium us- 



suriense sensu auct. Japon., non Regel Miyama-noki- 



SHiNOBU. Rhizomes slender, long-creeping, about 1.5 



mm. across, densely scaly toward the tip, the scales appressed, 

 deltoid-ovate, 0.5-0.7 mm. long, abrupdy acuminate, black- 

 brown; fronds evergreen, remote, 10-20 cm. long, glabrous; 

 stipes 2-5 cm. long; blades thinly coriaceous, linear-lanceolate, 

 0.5-1.5 cm. wide, acuminate at both ends, entire, the margins 

 sometimes slighdy recurved, green, with minute appressed 

 ovate scales along the costa beneath while young; costa raised 

 on both sides, the veins invisible; sori on upper half of the 



blade, medial. Mossy rocks and tree-trunks in mountains; 



Hokkaido, Honshu, Shikoku, Kyushu. s. Kuriles. The 



typical variety occurs in e. Siberia, Manchuria, China, and Ko- 

 rea. 



6. Pleopeltis tosaensis (Makino) Ohwi. Polypodium 

 tosaense Makino; Lepisorus tosaensis (Makino) H. Ito; Poly- 

 podium lineare var. caudatum Makino; Polypodium lineare 



var. contortum sensu auct. Japon., non Christ Tsukushi- 



NOKi-SHiNOBU, Onaga-uraboshi. Rhizomes short-creeping, 

 densely scaly, 2-3 mm. across, the scales brown, broadly ovate, 

 2 (-2.5) mm. long, abrupdy contracted at the tip, hnear- 

 attenuate; fronds evergreen, approximate, 15-30 cm. long; 

 stipes 0.5-3 cm. long; blades thinly coriaceous, lanceolate to 

 narrowly so, broadest below the middle, acuminate to caudate, 

 often gradually attenuate at the base, deep green above, paler 

 beneath, glabrous or thinly scaly while young along the lower 

 half of the costa beneath; costa slender; sori mosdy in 2 

 series, much nearer the costa than the margin, sometimes with 



an isolated pair on the apical tail of blade. Honshu (s. 



Kinki Distr.), Shikoku, Kyushu. Formosa and China. 



7. Pleopeltis annuifrons (Makino) Nakai. Polypodium 

 annuijrons Makino; Lepisorus annuifrons (Makino) Ching 



HoTEi-sHiDA. Rhizomes creeping, 2-3 mm. across, 



densely scaly, the scales dark brown, ovate-deltoid, 1.5-2 mm. 

 long, abrupdy contracted at the tip to a linear tail; fronds 

 deciduous, 10-25 cm. long; stipes 1^ cm. long; blades firmly 

 chartaceous to thinly coriaceous, lanceolate, 15-30 mm. wide, 

 acuminate, sometimes obtuse at the tip, abrupdy narrowed at 

 base; costa slender, the veins not visible; sori on upper half of 

 blade, medial. Hokkaido, Honshu, Shikoku, Kyushu. 



4. NEOCHEIROPTERIS Christ Kuriha-ran Zoku 



Terrestrial; rhizomes long-creeping, dictyostelic, with clathrate scales; fronds herbaceous, remote; stipes inconspicuously 

 jointed; blades thin, pinnatifid or sometimes pedatisect, more commonly simple and entire; sparsely scaly; venation reticulate; 

 sori sometimes elongate, parallel to the costas near the base, more commonly round; paraphyses peltate or laterally affixed, 

 clathrate. Five or six species, India to e. Asia. 



lA. Blades lanceolate, 25-'10 cm. long, 4-7 cm. wide, broadest near middle, unlobed or rarely irregularly pinnacilobed; sori in a subcostal 



row on each side at least in lower part of blade I.N. cnsata 



IB. Blades deltoid-lanceolate, 10-20 cm. long, 1.5-5 cm. wide, broadest near base, usually sinuately lobed in lower part; sori scattered. 



2. N. subhastata 



1. Neocheiropteris ensata (Thunb.) Ching. Polypo- 

 dium ensatum Thunb.; Pleopeltis ensata (Thunb.) Moore; 

 Neolepisorus ensatus (Thunb.) Ching; Microsorium ensatum 

 (Thunb.) H. Ito Kuriha-ran. Rhizomes long-creeping, 



i-A mm. across, die scales membranous, ascending to ob- 

 liquely spreading, deltoid-lanceolate, 4-6 mm. long, acuminate, 

 ciliate, with oblong cell walls and translucent areolae; stipes 

 10-30 cm. long, usually shorter than the blades, scaly especially 



