ASPIDIACEAE 



61 



mohra pseudoaristata (Tagawa) H. ltd; Polystichum pseudo- 

 aristatttm Tagawa; Aspidium aristatum var. subdimorphum 

 Christ and var. dat'alliaejorme Christ; Polystichopsis pseudo- 

 aristata (Tagawa) Tagawa Kobano-kana-warabi. Dif- 

 fers from the preceding in tlie short-creeping rhizomes and 

 less remotely placed stipes; blades subdimorphic, tripinnate, 



gradually short-acuminate. Honshu (Kanto Distr. and 



westw.), Shikoku, Kyushu. s. Korea, Ryukyus, and For- 

 mosa. 



4. Arachniodes simplicior (Makino) Ohwi. Riimohra 

 simpUcior (Makino) Ching; Aspidium aristatum var. sim- 

 plicius Makino; Polystichum aristatum var. simplicius (Ma- 

 kino) Matsum.; Polystichum simplicius (Makino) Tagawa; 



Polystichopsis simplicior (Makino) Tagawa Hakata-shida. 



Rhizomes short-creeping, densely scaly, knotty, covered with 

 the basal stubs of old stipes; stipes 30-60 cm. long, straw- 

 colored or pale green, rather densely scaly; scales on stipe 

 and rachis tardily deciduous, broadly linear, 2-8 mm. long, 

 less than 1 mm. wide, gradually narrowed to a filiform tip, 

 ciliate at base, black-brown; blades broadly ovate, 25-40 cm. 

 long, 15-25 cm. wide, pinnate, the lowest pinnae with elon- 

 gate pinnate branches longer on posterior than on anterior 

 side, the terminal pinna coriaceous, linear-lanceolate, 15-25 

 cm. long, abrupdy contracted at tip, acuminate, short-petiolu- 

 late, dark green and lustrous above, paler beneath; pinnae 2-5 

 pairs, gradually acuminate, short-petiolulate; pinnules oblong- 

 ovate, 1-2.5 cm. long, oblique, obscurely auricled on anterior 

 side, obtuse, spine-tipped and -toothed, sometimes lobulate, 

 glabrate on both sides; sori median, in 2 rows on the pinnules; 



indusia orbicular-reniform, crenulate, about 1 mm. across. 



Honshu (Kanto Distr. and westw.), Shikoku, Kyushu. 



China. 



Var. major (Tagawa) Ohwi. Rtimohra simplicior var. ma- 

 jor (Tagawa) H. Ito; Polystichum simplicius var. majus Ta- 

 gawa; Polystichopsis simplicior var. major (Tagawa) Tagawa 



Oni-kana-warabi. Terminal pinna lanceolate-deltoid, 



broadened at base, gradually merging into the upper lateral 

 pinnae. Honshu (Kanto Distr. and westw.), Shikoku, Kyu- 

 shu. 



5. Arachniodes amabilis (Bl.) Tindale. Rumohra ama- 

 bilis (Bl.) Ching; Aspidium amabile Bl.; Polystichum amabile 

 (Bl.) J. Smith; Dryopteris amabilis (Bl.) O. Kuntze; Poly- 

 stichopsis amabilis (Bl.) Tagawa; Polystichum rhomboideum 



Schott; A. rhomboideum Wall, ex Mett. O-kana-warabi. 



Rhizomes short-creeping; stipes approximate, 20-40 cm. long, 

 often slighdy rubescent; scales on rhizomes and at base of 

 stipes dense, membranous, reddish brown, lanceolate, 8-10 

 mm. long, to 2 mm. wide, gradually narrowed to a filiform 

 tip, entire, scales on stipes and rachis filiform, deciduous, 2-5 

 mm. long; blades ovate to broadly so, 25-45 cm. long, 15-25 

 cm. wide, simply pinnate or more often with a pinnate branch 

 on posterior side in the lowest (or lower 2) pairs, the pinnae 

 3-7 pairs, lanceolate, 12-20 cm. long, 2-3.5 cm. wide, acumi- 

 nate, petiolulate; terminal pinnae acuminate, short-petiolulate; 

 pinnules firmly chartaceous to subcoriaceous, deltoid-ovate to 

 oblong-ovate, 1.5-3 cm. long, 8-12 mm. wide, oblique, short- 

 petiolulate, subacute, spine-tipped and -toothed, slighriy lus- 

 trous above, glabrate on both sides; sori submarginal, in 2 ser- 

 ies on the pinnules, nearer the margin than the costule; indusia 

 orbicular-reniform, 1-1.5 mm. across, ciliate, sparsely puberu- 



lent on back. Honshu (Kanto Distr. and wesrw.), Shikoku, 



Kyushu. Ryukyus, Formosa, China to Malaysia, and India. 



Var. yaloisimensis (H. Ito) Ohwi. Rumohra amabilis var. 

 yak^usimensis H. Ito; Polystichum aristatum var. ya^usimense 

 (H. Ito) Masam.; Polystichopsis amabilis var. ya\usimcnsis 

 (H. Ito) Tagawa Yakushima-kana-warabi. Fronds nar- 

 rower, 45-60 cm. long; pinnae 7-9 pairs, the pinnules smaller, 

 coriaceous, often lobed to parted, 7-15 mm. long; indusia not 

 ciliate. Honshu (Kii Prov.), Shikoku, Kyushu. Ryuk- 

 yus, Formosa, and China. 



6. Arachniodes nipponica (Rosenst.) Ohwi. Rumohra 

 nipponica (Rosenst.) Ching; Polystichum nipponicum 



Rosenst.; Polystichopsis nipponica (Rosenst.) Tagawa Mi- 



dori-kana-warabi. Rhizomes creeping, densely scaly; stipes 

 approximate, 30—45 cm. long, straw-colored to reddish; scales 

 membranous, dense toward base, sparse above, lanceolate, the 

 lower 5-10 mm. long, the upper 3-5 mm. long, entire, decidu- 

 ous, the base persistent, callose, red-brown; blades vivid green 

 above, paler beneath, firmly herbaceous to subcoriaceous, nar- 

 rowly ovate, 40-60 cm. long, 25-35 cm. wide, long-acuminate; 

 scales on rachis sparse, 1-2 mm. long, linear-lanceolate, 

 deciduous; pinnae 6-8 pairs, 15-30 cm. long, pinnate or 

 partially bipinnate, petiolulate, long-acuminate, the lateral 

 gradually grading into the terminal pinna; pinnules herba- 

 ceous to firmly so, ovate, sometimes oblong, oblique, 12-30 

 mm. long, 6-15 mm. wide, acute, short-petiolulate, pinnately 

 lobed or parted, mucronate-toothed, nearly glabrous above, 

 with hairlike scales beneath while young; sori nearly median; 

 indusia orbicular-reniform, sparsely ciliolate, about 1 mm. 



across. Honshu (from Izu Prov., Tokaido to Kinki and 



Chijgoku Distr.), Shikoku, Kyushu. China. 



7. Arachniodes cavaleriei (Christ) Ohwi. Rumohra 

 cavaleriei (Christ) Ching; Aspidium cavaleriei Christ; Dryop- 

 teris cavaleriei (Christ) C. Chr.; Polystichopsis cavaleriei 

 (Christ) Tagawa; Polystichum globisorum Hayata; Rumohra 

 globisora (Hayata) H. Ito; Dryopteris sphaerosora Tagawa 

 Yakushima-kana-warabi. Rhizomes short-creeping to as- 

 cending; stipes tufted, purple-brown, 30-60 cm. long, sparsely 

 scaly above and on rachis, densely scaly at base; scales lanceo- 

 late to linear-lanceolate, 10-15 mm. long, 1.5-2.5 mm. wide, 

 much elongate at tip, contorted; blades broadly ovate, 30-55 

 cm. long, 25^0 cm. wide, acuminate; pinnae about 5 pairs, del- 

 toid-ovate, 20-30 cm. long, 15-20 cm. wide, acuminate, petiolu- 

 late, bipinnate at base, pinnate in upper part; pinnules herba- 

 ceous to coriaceous, narrowly deltoid-ovate to broadly deltoid- 

 lanceolate, usually acuminate, crenate-toothed, petiolulate, 

 pinnately lobed to parted, obtusely toothed; sori in 2 series 

 along the costule; indusia orbicular-reniform, 1.5-2.5 mm. 



across, ciliolate. Kyushu (Yakushima). Formosa, China, 



and Indochina. 



8. Arachniodes assamica (Kuhn) Ohwi. Rumohra as- 

 samica (Kuhn) Ching; Aspidium assamicum Kuhn; Poly- 

 stichum assamicum (Kuhn) Ching ex C. Chr.; Polystichopsis 

 assamica (Kuhn) Tagawa; Aspidium yoshinagae Makino; 



Polystichum yoshinagae (Makino) Makino Otoko-shida. 



Rhizomes short-creeping; stipes approximate, 20-50 cm. 

 long, straw-colored, slightly lustrous, sparsely scaly; scales 

 dense toward the base, broadly linear, 3-6 mm. long, long- 

 attenuate, entire, purple-brown; blades narrowly oblong to 

 broadly deltoid-lanceolate, 30-60 cm. long, 10-20 cm. wide, 

 short-acuminate, pinnate, sometimes bipinnate to bipinnati- 

 parted; pinnae 10-13 pairs, lanceolate, acuminate, die petioles 

 5-20 mm. long, the simple pinnae 6-10 cm. long, 1.5-2 cm. 

 wide, cuneate at base, slightly oblique, coarsely short awn- 



