Aspidiaceae; Blechnaceae 



costal, linear, obliquely ascending, straight; indusia 2-4 mm. 



long, nearly equal in length, narrow. Kyushu (Yaku- 



shima) ; rare. Ryukyus, Formosa, and Indochina. 



50. Athyrium mettenianum (Miq.) Ohwi. Asplenium 

 mettenianum Miq.; Diplazium mettenianum (Miq.) C. Chr.; 



Asplenium textori Miq.; D. textori (Miq.) Makino Mi- 



YAMA-NOKOGiRi-sHiDA. Rhizomes long-creeping, firm, 3-4 

 mm. across, black-brown, scaly; stipes 30-40 cm. long, pale 

 green to pale brown, thinly scaly and dark brown toward 

 base; scales firmly membranous, the upper ones brown, the 

 basal nearly black, linear, 3-4 mm. long, about 0.5 mm. 

 wide, sparsely spine-toothed toward tip; blades narrowly ovate 

 to broadly lanceolate, 20-40 cm. long, 8-20 (-30) cm. wide, 

 long-acuminate, not contracted at base; pinnae 10-13 pairs, 

 horizontally spreading, equilateral except sometimes the lowest 

 one, lanceolate, 4-10(-15) cm. long, I-3(-3.5) cm. wide, short- 

 petiolulate, pinnatilobed, the upper pinnae smaller and de- 

 current on the rachis; sori linear, 3-7 mm. long, slighdy arcu- 

 ate, median, or those on the lowest veinlets often diplazioid 



and longer. Honshu (Izu Prov., Tokaido, Kinki Distr. and 



west\v.), Shikoku, Kyushu. Ryukyus, Formosa, China, 



and Philippines. 



Var. fauriei (Christ) Ohwi. Diplazium jauriei Christ; D. 



mettenianum var. fauriei (Christ) Tagawa Hosoba-noko- 



GiRi-SHiDA. Pinnae irregularly toothed. Occurs with the 

 species. 



Var. isobasis (Christ) Ohwi. Diplazium isobasis Christ; 



D. mettenianum var. isobasis (Christ) Tagawa Kireba- 



NOKOGiRi-SHiDA. Pinnae deeply parted. Occurs with the 



species. 



51. Athyrium sheareri (Bak.) Ching. Nep/irodium 

 sheareri Bak.; Dryopteris sheareri (Bak.) C. Chr.; N. poly- 

 podijorme Makino; D. polypodijormis (Makino) C. Chr.; A. 



polypodiforme (Makino) Tagawa Uraboshi-nokogiri- 



SHIDA. Rhizomes creeping, 3-4 mm. across, densely scaly 

 toward the tip; stipes slender, 20-40 cm. long, glabrous, straw- 

 colored or pale green, thinly scaly and dark brown toward 

 base; scales brown, broadly linear, 3-5 mm. long, about 0.5 

 mm. wide, long-acuminate, entire; blades chartaceous, simply 

 pinnate, broadly lanceolate to narrowly ovate, 20-30 cm. long, 

 10-20 cm. wide, caudately long acuminate, glabrous, the rachis 

 and costas usually thinly white-puberulent on both sides; 

 pinnae 5-7 pairs, alternate or subopposite, nearly equilateral, 

 spreading, lanceolate to broadly so, caudately long-acuminate, 

 falcate, truncate at base, sessile, the lower pinnae pinnately 

 lobed to parted, 15-25(-30) mm. wide, short-petiolulate, die 

 upper pinnae decurrent on the rachis, forming a pinnatilobed 

 tail at the tip; pinnules oblong-ovate to lanceolate, 4-6 mm. 

 wide, obtuse to acute, spine-toothed; veinlets simple or forked, 

 ending in a tooth; sori 6-14, median or slighdy nearer the 

 costule than the margin; indusia short, obovate, straight, or 



more often reniform, 0.5-0.7 mm. across, dentate. Honshu 



(Izu and Echigo Prov. westw.), Shikoku, Kyushu. Korea 



(Quelpaert Isl.) and China. 



19. DIPLAZIOPSIS C. Chr. Iwaya-shida Zoku 



Terrestrial; rhizomes ascending, brown-scaly; fronds membranous, simply pinnate; pinnae large, all alike, entire or undulate, 

 glabrous; veins remote, free at base, then divaricately branched and anastomosing; sori on the acroscopic side of the veins, ex- 

 tending from the costa to the lowest areoles; indusia very thin, opening usually along the back of sorus, sometimes along the 

 distal side. Few species, India to Japan, and Samoa. 



1. Diplaziopsis cavaleriana (Christ) C. Chr. Allanto- 

 dia cavaleriana Christ; Diplaziopsis javanica var. cavaleriana 

 (Christ) Tagawa; Diplazium javanicum sensu auct. Japon., 

 non Makino; Diplaziopsis javanica sensu auct. Japon., non C. 



Chr. IwAYA-sHiDA. Rhizomcs creeping; stipes 30-50 



cm. long, pale green to straw-colored, smooth in upper part, 

 sparsely scaly toward the base; scales membranous, lanceolate, 

 5-8 mm. long, 1.5-3 mm. wide, acuminate, entire; blades 

 broadly lanceolate to narrowly ovate-oblong, 50-70 cm. long, 

 17-30 cm. wide, sometimes slightly narrowed at base, simply 

 pinnate, glabrous, green above, slighdy glaucous beneath; 

 pinnae 8-13 pairs, thinly membranous, spreading, equilateral. 



oblong- to linear-lanceolate, 10-15 cm. long, 15-20 mm. wide, 

 or the sterile ones to 3 cm. wide, gradually acuminate-tailed, 

 truncate to very broadly cuneate at base, sessile, sometimes 

 obsoletely auriculate at base, undulate to crenate; veins spread- 

 ing, slender, forked near base and forming 4 or 5 rows of 

 oblong to narrowly ovate somewhat 4-angled areolae on each 

 side of the pinnae; sori linear-oblong to -lanceolate, on the 

 lower half of the veins; indusia thinly membranous, linear- 

 lanceolate, obtuse at both ends, nearly straight to very slighdy 



arcuate. Dark, damp woods; Honshu (Ugo Prov., s. 



Kanto Distr. and westw.), Shikoku, Kyushu. China. 



Fam. 18. BLECHNACEAE Shishigashira Ka Blechnum Family 



Terrestrial, rarely scandent; rhizomes creeping or erect, dictyostelic, with nonclathrate scales; fronds usually pinnatifid to 

 pinnate or decompound, rarely simple; veinlets branched and anastomosing, forming a secondary vein or veins enclosing a row 

 of areolae on each side of the costa, or free in the sterile pinnae; sori on the secondary veins, separate or united; indusia opening 

 on the costal side, very rarely absent; sporangia rather large. Cosmopolitan, with about 8 genera and about 250 species. 



lA. Fronds usually dimorphic, with sterile and fertile fronds (except B. orientale); veins free in the sterile pinnae; sori fused. 1. Blechnum 

 IB. Fronds monomorphic or nearly so; veins anastomosing; sori separate, not fused 2. Woodwardia 



1. BLECHNUM L. Shishigashira Zoku 



Terrestrial; rhizomes usually stout, erect or sometimes creeping, dictyostelic; fronds usually dimorphic, coriaceous, pinnate 

 or sometimes pinnatifid, rarely simple or bipinnate, glabrous, entire or toothed; veins of sterile pinnae mosdy free; sori on 

 the vascular commissures parallel to the costa, fused in a single uninterrupted line on each side; indusia attached to the fertile 

 commissure and opening on the side toward the costa. About 200 species, abundant in the S. Hemisphere. 



