56 



ASPIDIACEAE 



scaly, the scales firmly membranous, spreading, rusty-brown, 

 linear-lanceolate to linear, 2.5^ mm. long, long-acuminate, 

 with woollike hairs on margin toward base; blades lanceo- 

 late, 5-18 cm. long, 1.5-3.5 cm. wide, slightly narrowed at 

 base, the rachis often much-prolonged, proliferous and rooting 

 at the tip; pinnae 15-35 pairs, firmly herbaceous, spreading, 

 dark green and glabrate above, paler and with hairlike scales 

 beneath, sessile, narrowly oblong to narrowly ovate-oblong, 

 1-1.5 cm. long, obtuse, with ascending, short, awn-tipped 

 teeth, the anterior side oblique, broadly cuneate at base, auri- 

 cled; sori in 1 series on anterior side near margin of the pinnae; 

 indusia large, brown, orbicular, about 2 mm. across, depressed, 



incurved on margin, entire, persistent, inflated. Shaded 



rocks in mountains; Hokkaido, Honshu, Shikoku, Kyushu. 

 Korea, China, Manchuria, to e. Siberia. 



6. Polystichum inaense (Tagawa) Tagawa. Dryopteris 



inaensis Tagawa Ina-denda. Rhizomes short; stipes 



spreading, slender, 1-4 cm. long, pale green, the scales brown, 

 narrowly lanceolate to linear, about 2 mm. long, entire; blades 

 thinly herbaceous, lanceolate to linear-lanceolate, 3-7 cm. long, 

 8-12 mm. wide, acute, slightly narrowed at base, simply pin- 

 nate, the rachis slender, green, with brown linear scales; pinnae 

 12-17 pairs, spreading, ovate, acute with a mucro at the tip, 

 broadly cuneate at base, with scattered short linear scales on 

 both sides, coarsely mucronate-toothed, the lower ones usually 

 pinnately parted to lobed; sori 1 to few on a pinna, between 

 the costa and the margin; indusia membranous, orbicular- 



reniform, about 1 mm. across, deeply erose-dentate. Rocks 



in high mountains; Honshu (s. Shinano Prov. and w. Mu- 

 sashi Prov.) ; very rare. 



7. Polystichum lachenense (Hook.) Bedd. Aspidium 

 lachenense Hook.; Dryopteris lachenensis (Hook.) O. Kuntze 



Takane-shida. Rhizomes rather stout; fronds tufted; 



stipes erect, short, 3-10 cm. long, sparsely scaly in upper part, 

 densely so near base; scales on upper part of stipe and rachis 

 membranous, brown, spreading, linear to linear-lanceolate, 

 2-4 mm. long, entire, ciliate at the more or less dilated base, 

 deciduous; scales on the lower part of stipe ovate, deep brown, 

 those on the underside of pinnae linear, about 1 mm. long; 

 blades linear-lanceolate, 8-20 cm. long, 1.5-2.5 cm. wide, acute, 

 slightly narrowed at base; pinnae 15-25 pairs, herbaceous, 

 spreading, green and glabrate on upper side, thinly scaly be- 

 neath, ovate, obtuse to acute, sessile, with rather coarse awn- 

 tipped teeth, sometimes lobed; costas and veins not prominent; 

 sori to 12, in 2 series on the pinnules, between the costa and 

 the margin or slightly nearer the costa; indusia about 1 mm. 



across, erose, slightly impressed. Rocky slopes in alpine 



regions; Honshu (centr. mountains); very rare. China to 



the Himalayas. 



8. Polystichum rigens Tagawa. Oni-inode. Stipes 

 20-40 cm. long, 2.5-3 mm. wide at base, straw-colored in up- 

 per part, darker at base, rather densely scaly, the scales brown, 

 the lower ones often blackish, 5-12 mm. long, long-acumi- 

 nate, ciliate-toothed, the basal ones narrowly ovate, to 15 mm. 

 long, about 5 mm. wide; blades firmly coriaceous, narrowly 

 ovate-oblong, 30-45 cm. long, 10-20 cm. wide, acuminate, bi- 

 pinnate, the scales of the rachis gradually long-acuminate, 

 slightly falcate, lanceolate, ciliate, 4-6 mm. long; pinnae lanceo- 

 late, 15-25 mm. wide, the lower ones very short-petiolulate; 

 pinnules obliquely ovate, 10-12 mm. long, 4-7 mm. wide, acute 

 with a firm spine at the tip, spine-toothed to subentire, glabrous 

 on upper side, with scattered filiform-tipped scales beneath, 



decurrent on the narrowly winged rachis; sori in 2 series on 

 the pinnules, between the costule and the margin; indusia 

 caducous, membranous, about 1.5 mm. across, impressed in the 

 center. Honshu (Kanto Distr. and westw.). 



9. Polystichum mayebarae Tagawa. P. tstissimense 



var. mayebarae (Tagawa) Kurata O-kiyozumi-shida. 



Closely allied to the preceding; rhizomes stout, short, densely 

 clothed with the basal stubs of old stipes; stipes straw-colored, 

 rather densely scaly, the scales black-brown, lustrous, spread- 

 ing, linear-lanceolate, 7-10 mm. long, sparsely long-attenuate, 

 spinose-ciliate on lower margin, the basal scales dark brown, 

 narrowly oblong, abruptly acuminate; blades ovate-lanceolate, 

 30-40 cm. long, 10-18 cm. wide, bipinnate, the rachis promi- 

 nently scaly, the scales chartaceous, spreading, black-brown, 

 linear-lanceolate to broadly linear, thinly spinulose on lower 

 half; pinnae lanceolate, 1.5-3 cm. wide; pinnules rhombic- 

 ovate, 8-15 mm. long, 5-8 mm. wide, acute with a short spine 

 at the tip, spinulose-toothed on upper margin; sori 2-10, in 2 

 series on the pinnules, between the costule and the margin or 



slightly nearer the costule; indusia about 1.5 mm. across. 



Honshu (Kanto through Tokaido to Kinki and Chugoku 

 Distr.), Shikoku, Kyushu; rare. 



10. Polystichum tsussimense (Hook.) J. Smith. Aspid- 

 ium tsussimense Hook.; Polystichum- monotis Christ Hime- 



kana-wakabi. Rhizomes rather stout, short, covered with 

 the basal stubs of old stipes; fronds tufted; stipes pale green to 

 straw-colored, brownish at base, rather sparsely scaly in upper 

 part, densely so at base; scales on stipes and rachis black-brown, 

 linear to nearly filiform, 3-5 mm. long, the basal scales oblong- 

 lanceolate, 1-1.2 cm. long, abruptly contracted at the tip, 

 acuminate; blades broadly lanceolate to oblong-ovate, 25-40 

 cm. long, 10-20 cm. wide, acuminate, the rachis prominently 

 scaly; pinnules oblique, ovate to oblong-ovate, 7-15 mm. long, 

 3-7 mm. wide, acute and spine-tipped, sessile, gray-green and 

 glabrous above, with scattered hairlike scales beneath, spine- 

 toothed; sori in 2 series on the pinnules, inserted in a shallow 



pit; indusia deciduous, flat, about 1 mm. across. Honshu 



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



China, and Formosa. 



H. Polystichum neolobatum Nakai. P. lobatum var. 



chinense Christ Ina-inode. Stipes 5-30 cm. long, rather 



stout, straw-colored, brown at base, densely scaly, the scales 

 spreading, membranous, brown, lustrous, ciliate, the larger 

 ones broadly ovate, 1-2.2 cm. long, 3-10 mm. wide, abruptly 

 acuminate, the smaller ones lanceolate to linear-lanceolate, 3-10 

 mm. long, 0.5-2 mm. wide; blades broadly lanceolate, 20-80 

 cm. long, gradually acuminate, slightly narrowed at base, bi- 

 pinnate or the smaller ones bipinnatiparted, the scales on rachis 

 dense, linear-filiform, 2.5-4 mm. long, contorted, mixed with 

 broader scales in lower portion; pinnae 15-40 pairs, firmly 

 coriaceous, spreading, lanceolate to ovate, acuminate, subsessile, 

 sparsely scaly on upper side, more densely so beneath, the scales 

 pale brown, hairlike, 1-2 mm. long; pinnules obliquely ovate, 

 7-15 mm. long, 3-7 mm. wide, acute with a pungent spine at 

 the tip, with few spine-tipped teeth on margin, lustrous on 

 both sides; veinlets slender, slightly impressed beneath; sori in 

 2 series on the pinnules of upper portion of blade; indusia flat, 

 brownish, entire, about 1.2 mm. across. Honshu (s. Shi- 

 nano and Sagami Prov.) ; very rare. China, Formosa, and 



India. 



12. Polystichum doianum Tagawa. Sakurajima-inode. 

 Stipes 25-30 cm. long, straw-colored, with 3 kinds of scales. 



