ASPIDIACEAE 



75 



10 pairs, nearly horizontally spreading, lanceolate to oblong, 

 caudate-acuminate; pinnules lanceolate, acute or obtuse, pin- 

 nately parted to obtusely toothed, decurrent in the upper ones, 

 short-pilose beneath; sori in 2 series, between the costule and 



margin of the pinnules; indusia orbicular-reniform, pilose. 



Honshu (Mikawa and Harima Prov.), Shikoku, Kyushu; rare. 



China. 



17. Lastrea oligophlebia (Bak.) Copel. Nephrodiitm 

 oligophlcbitiin Bak.; Dryopteris oligophlebia (Bak.) C. Chr.; 

 D. elegans Koidz.; D. oligophlebia var. elegans (Koidz.) H. 



Ito; Thelypteris oligophlebia var. elegans (Koidz.) Ching 



HiME-WAR.\Ei. Rhizomes very short, creeping or ascending; 

 fronds deciduous; stipes 40-60 cm. long, green to straw-colored, 

 sparsely scaly at base; scales linear-lanceolate, 6-10 mm. long, 

 entire, short-pilose; blades yellowish to bright green, ovate to 

 elliptic-ovate, 30-80 cm. long, 20-50 cm. wide, 3- or 4-pinnati- 

 parted; pinnae broadly lanceolate, 5-8 cm. wide in the upper 

 ones, about 10 cm. wide in the lowest, acuminate, short-petiolate 

 in the lower; pinnules narrowly to broadly lanceolate, acumi- 

 nate, short-pilose on the costas and costules above, sparingly 

 long-pilose beneath, the rachis more or less narrowly winged 

 except near the base; pinnules obliquely spreading, oblong to 

 lanceolate, obtuse to acuminate, subentire or lobulate to pinna- 



tiparted, sessile, frequently more or less adnate to the axis; vein- 

 lets simple to once forked; sori between the veins and margin; 



indusia orbicular-reniform, glandular, often pilose. Thickets 



in lowlands and hills; Honshu (Kanto Distr. and westw.), Shi- 

 koku, Kyushu; common. Korea, Ryukyus, Formosa, China. 



Var. lasiocarpa (Hayata) H. Ito. Aspidium ttliginosum 

 Kunze; Dryopteris uliginosa (Kunze) C. Chr.; Thelypteris 

 uliginosa (Kunze) Ching; Dryopteris lasiocarpa Hayata; D. 

 oligophlebia var. lasiocarpa (Hayata) Nakai; Thelypteris 



oligophlebia var. lasiocarpa (Hayata) H. Ito Arage-hime- 



wARABi. Differs from the typical phase in the longer 1- to 



5-celled hairs of the indusia, rachis, and costas of blades. 



Honshu (Hachijo Isl.), Kyushu. Ryukyus and Formosa. 



Var. subtripinnata (Tagawa) Ohwi. Dryopteris elegans 

 var. subtripinnata Tagawa; D. oligophlebia var. subtripinnata 

 (Tagawa) H. Ito; Thelypteris oligophlebia var. subtripinnata 

 (Tagawa) H. Ito; T. viridijrons Tagawa; D. viridijrons (Ta- 

 gawa) Tagawa; L. viridijrons (Tagawa) Tagawa Midori- 



HiME-wARABi. Blades mostly larger, bright green, mem- 

 branous; pinnules spaced, broader, with a distinct, short 



petiolule, at least in the lower ones. Honshu (Kanto Distr. 



and westw.), Kyushu. Korea. 



14. GYMNOCARPIUM Newm. Usagi-shida Zoku 



Slender, glabrous ferns; rhizomes wiry, slender, long-creeping; stipes slender, often minutely glandular; blades thinly 

 herbaceous, deltoid to ovate-deltoid, pinnatifid to 2- or 3-pinnatiparted, jointed at the base or at base of the pinnae; veins pinnate, 

 free; sori dorsal on the veins, rounded to oblong; indusia absent. Few species, in the temperate regions of the N. Hemisphere. 



lA. Blades 2- or 3-pinnatiparted. 



2A. Blades 5-angIed, membranous; lowest lateral pinnae nearly or as large as the remainder (terminal pinna) of the blade. 



1 . G. dryopteris 

 2B. Blades deltoid -ovate, chartaceous-membranous; lowest lateral pinnae distlncdy smaller than the remainder (terminal pinna) of the 



blade 2. G. robertianum var. longtim 



IB. Blades simply pinnatiparted to -cleft 3. G. oyamense 



1. Gymnocarpium dryopteris (L.) Newm. Polypod- 

 ium dryopteris L.; LMStrea dryopteris (L.) Bory; Phegopteris 

 dryopteris (L.) Fee; Polypodium disjunctum Rnpr.; Dryopteris 

 disjuncta (Rupr.) Mort.; G. robertianum var. disjunctum 

 (Rupr.) Ching; D. linnaeana C. Chr. Usagi-shida. Rhi- 

 zomes long-creeping, wiry, about 1 mm. across, scaly when 

 young; fronds deciduous, slender, glabrous, often slighdy 

 glaucescent on the blades beneath; stipes slender, pale green, 

 lustrous, sparsely scaly, 10-25 cm. long, dark brown at base; 

 scales pale brown, thinly membranous, narrowly ovate, 2-3 

 mm. long, glabrous, those at base of stipes and on rhizomes 

 broadly ovate, 3-4 mm. long; blades membranous, 5-angled, 

 deltoid, 8-15 cm. long, slightly broader than long, glabrous, 

 smooth; pinnae 3, the terminal as large as to only slighdy 

 larger than the lateral ones, deltoid, 5-10 cm. wide, gradually 

 acute, bipinnatiparted or in lower part bipinnate, the petioles 

 1.5-4 cm. long; pinnules deltoid-lanceolate, subacute to obtuse, 

 sessile except for the lowest pair on the terminal pinna, some- 

 times petiolate, the ultimate pinnules narrowly oblong, obtuse, 

 crenate to lobulate; sori in 2 series on the pinnules, nearer the 



margin tlian the costule. Coniferous woods; Hokkaido, 



Honshu (centr. and n. distr.). Sakhalin, Korea, Himalayas, 



Siberia to Europe, and N. America. 



2. Gymnocarpium robertianum (Hoffm.) Newm. var. 

 longulum (Christ) H. Ito. Aspidium dryopteris var. longu- 

 lum Christ; Dryopteris jessoensis Koidz.; G. jessoense (Koidz.) 



Koidz.; G. longulum (Christ) Kitag.; Lastrea robertiana var. 



longula (Christ) Ohwi Iwa-usagi-shida. Closely allied to 



the preceding but frequendy sparsely grandular on the stipes 

 and blades, especially so on the nodes of the rachis; blades 

 chartaceous-membranous, firmer, deltoid-ovate, 18-20 cm. 

 long, 14-18 cm. wide; lateral pinnae narrowly ovate-deltoid, 

 9-10 cm. long, 6-8 cm. wide, the petioles 15-20 mm. long, 

 the lowest pinnae distincdy smaller than the remainder of the 

 blade, the terminal pinna 13-15 cm. long, 10-11 cm. wide; 

 pinnules linear-oblong, rounded to obtuse, pinnately cleft to 



toothed. Coniferous woods; Hokkaido, Honshu (Kanto 



and centr. distr.), Shikoku (high mts.). Korea, n. China, 



and e. Siberia. The typical phase occurs from Siberia to 

 Afghanistan and Europe, also in N. America. 



3. Gymnocarpium oyamense (Bak.) Ching. Polypod- 

 ium oyamense Bak.; Dryopteris oyamensis (Bak.) C. Chr.; 

 Currania oyamensis (Bak.) Copel.; Phegopteris oyamensis 

 (Bak.) Rosenb.; Polypodium krameri Fr. & Sav., incl. var. 

 incistim Fr. & Sav.; Phegopteris \ramcri (Fr. & Sav.) Makino 



Ebira-shipa. Rhizomes wiry, long-creeping, 1.5-2 mm. 



across, the scales scattered, pale brown, broadly lanceolate, 

 3-4 mm. long, long-acuminate; fronds deciduous, slender, 

 glabrous, slightly glaucous; stipes interrupted, 12-20 cm. long, 

 slender, pale green, dark brown at base; scales sparse, pale 

 brown, thinly membranous, deciduous; blades chartaceous- 

 membranous to membranous, ovate-deltoid, 10-15 cm. long, 



