ASPLENIACEAE 



93 



costa very slender, close to the posterior margin, pinnately 

 veined on anterior side, the median ones once-forked, ending 

 in a tooth; sori on the teeth, few to a pinna; indusia 1.5-2.5 



mm. long.- — —Kyushu (Yakushima and Tanegashima). 



Formosa, China, Indochina to India, and Malaysia. 



2. Asplenium unilaterale Lam. Hymenasplenium uni- 



latcrale (Lnm.) Hayata; A. resectum Smith Hobi-shida. 



Rhizomes long-creeping, scaly, 1.5-3 mm. across; stipes 

 slender, remote, 12-20 cm. long, 1-1.5 mm. across, lustrous, 

 purple- to chestnut-brovifn, glabrous except for few scales at 

 base; scales on rhizomes and at base of stipes lanceolate, 2-3 

 mm. long, long-acuminate, tardily deciduous, dark brown, 

 with few obsolete teeth on upper margin; blades broadly 

 linear to lanceolate, 18-30 cm. long, 3.5-6(-8) cm. wide, 

 abrupdy to gradually long-acuminate, not or very slighdy 

 narrowed at base, glabrous, the rachis with deciduous hairlike 

 dark brown scales while young, lustrous, deeply sulcate on 

 upper side; pinnae rather many, thinly herbaceous to mem- 

 branous, spreading, lanceolate to broadly so, 4-10 mm. wide, 

 subacute to obtuse, toothed toward the tip, entire toward the 

 base, short-petiolulate, the costa slender, sometimes dark pur- 

 ple-brown beneath, close to the posterior margin near base, the 

 veins mosdy once-forked; sori dorsal, sparse, linear; indusia 



2-6 mm. long, nearly straight, very rarely diplazioid. 



Honshu (s. Kanto through Tokaido to s. Kinki Distr. and 



westw.), Shikoku, Kyushu. Ryukyus, Bonins, Formosa, 



Malaysia, China to India, Africa, Polynesia, and Hawaii. 



3. Asplenium oligophlebium Bak. A. jauriei Christ 



Kamigamo-shida, Hime-chasen-shida. Rhizomes short, 



erect to ascending, often clothed in the remains of old stipes, 

 the scales rather scanty, lanceolate, about 1 mm. long, purple- 

 trown, acuminate; fronds smooth, rather small; stipes 

 crowded, 2-8 cm. long, 0.6-1 mm. across, glabrous, lustrous, 

 deep purple-brown; blades narrowly lanceolate, 7-15 cm. 

 long, 1.5-3.5 cm. wide, the rachis dark purple-brown, lustrous, 

 slender, often prolonged and gemmate at the tip; pinnae 

 thinly herbaceous, squarrose-lanceolate to semideltoid, 7-15 

 mm. long, 3-5 mm. wide, obtuse, obliquely cuneate at base, 

 sessile, with scattered coarse obtuse teeth, entire on posterior 

 margin of lower portion, the costa slender, the veins few, 

 simple to once forked; sori few on a pinna; indusia 1-2 mm. 



long. Honshu (Hokuriku to Kinki and Chugoku Distr.), 



Shikoku, Kyushu. Ryukyus. 



4. Asplenium normale Don. A. opacum Kunze 



NuRi-TORA-No-o. Rhizomes short, with chartaceous, lanceo- 

 late, dark brown scales about 1.5 mm. long; fronds mfted; 

 stipes 1-2 mm. across, dark purple- to chestnut-brown, lustrous, 

 3-15 cm. long, naked; blades broadly linear to linear-lanceo- 

 late, 10-40 cm. long, 15-40 mm. wide, the rachis dark purple- 

 brown, lustrous, sulcate on upper side, often prolonged and 

 gemmate at tip; pinnae spreading, obliquely oblong to nar- 

 rowly oblong-ovate, 5-10 mm. wide near base, the lower ones 

 deflexed, obtuse to rounded, sessile, crenately toothed at the 

 tip, entire toward the base, often obsoletely auricled on 

 anterior side; sori few to a pinna, straight; indusia 1-4 mm. 



long, very rarely diplazioid. Honshu (Kanto Distr. and 



westw.), Shikoku, Kyushu. Ryukyus, Formosa, s. China to 



India. 



5. Asplenium trichomanes L. A. trichomanoides 



Houtt. Chasen-shida. Rhizomes short, erect, with the 



remains of old stipes, and with linear-lanceolate, acuminate 

 scales about 3 mm. long; fronds deep green, nearly naked, 



tufted; stipes 1-5 cm. long, chestnut-brown, lustrous, very 

 narrowly winged or angled, flat on upper side, obtuse on 

 back; blades linear to broadly so, 10-25 cm. long, 12-20 mm. 

 wide, gradually narrowed to an obtuse tip, slightly narrowed 

 at base, the rachis lustrous, narrowly winged, obtuse to sub- 

 acute, not winged on back; pinnae nearly all alike, firmly 

 herbaceous, elliptic, ovate or oblong, 4-8(-10) mm. long, 3-6 

 mm. wide, spreading, rounded at apex, obliquely cuneate at 

 base, obtusely toothed; sori usually less than 10 to a pinna; 



indusia about 1.5 mm. long. On rocks; Hokkaido, Honshu, 



Shikoku, Kyushu. Formosa to the Himalayas, Caucasus, 



Europe, S. Africa, Australia, N. and S. America. 



6. Asplenium tripteropus Nakai. A. anceps var. proU- 

 fertim Nakai Inu-chasen-shida. Closely allied to the pre- 

 ceding, the stipes and rachis somewhat stouter, narrowly 

 winged on back and margin, sometimes gemmate on upper 

 part of rachis; rhizomes short, the scales lanceolate, about 3 

 mm. long, short-acuminate; fronds tufted; stipes 1-8 cm. long, 

 chestnut-brown, lustrous, with 3 narrow brown wings; blades 

 linear to broadly so, 7-25 cm. long, 15-25 mm. wide, gradually 

 narrowed to an obtuse tip, slighdy narrowed at base; pinnae 

 oblong or oblong-ovate, sometimes elliptic, 5-13 mm. long, 

 3-6 mm. wide near base, rounded at the tip, obliquely cuneate 

 at base, obtusely toothed, spreading, sessile; sori 2-10 on a 



pinna; indusia 1-2 mm. long. Honshu (Sagami and Etchu 



Prov., Kinki Distr. and westw.), Shikoku, Kyushu. For- 

 mosa and China. 



7. Asplenium viride Huds. A. trichomanes var. ranto- 



sum L. Ao-CHASEN-sHiDA. Rhizomcs short, ascending, 



the scales linear-lanceolate to broadly linear, about 3 mm. long, 

 entire, gray-brown; fronds tufted, glabrous; stipes erect, 2-5 

 cm. long, 0.5-1 mm. across, chestnut-brown, lustrous at least 

 on lower half, green at tip, shallowly sulcate on upper side; 

 blades suberect, linear to linear-lanceolate, 5-12 cm. long, 8-12 

 mm. wide, obtuse, not or slighdy narrowed at base; pinnae 

 10-17 pairs, herbaceous, rhombic-ovate to rhombic-orbicular, 

 3-6 mm. long, 3-5 mm. wide, obtuse to very obmse, oblique 

 and broadly cuneate at base, with few obtuse teeth near tip, 

 entire near base, sessile or very short-petiolulate, the costas and 

 veins very slender, inconspicuous on both sides, the veins 

 usually once forked; sori 2-6 on a pinna, on the lower portion 



of veins, subcostal; indusia l-1.5(-2) mm. long. On rocks 



in alpine regions; Hokkaido, Honshu (centr. and Kanto 



Distr.), Shikoku (Mount Tsurugi in Awa Prov.); rare. 



Sakhalin, Formosa to the Himalayas, Europe, and N. America. 



8. Asplenium incisum Thunb. A. elegantulum Hook. 



ToRA-No-o-SHiDA. Rhizomcs short, ascending, the scales 



membranous, broadly linear, 3-4 mm. long, gray-brown, en- 

 tire; fronds smooth, somewhat dimorphic, the sterile ones 

 smaller, 5-15 cm. long, with a short stipe 1-3 cm. long, the 

 fertile erect, larger, 30 cm. long or more, with stipes 2-5 cm. 

 long; blades oblanceolate, 7-30 cm. long, 2-7 cm. vi'ide, acumi- 

 base, the sterile fronds pinnate to bipinnariparted, the fertile 

 ones 2- or 3-pinnatiparted, the rachis green on upper side, 

 mostly chestnut-brown beneath near base; pinnae herbaceous, 

 very short-petiolulate or sessile, spreading, acutely to obtusely 

 mucronate-toothed, the median fertile pinnae lanceolate-del- 

 toid, 6-35 mm. long, 7-15 mm. wide near base, obtuse to 

 acute, pinnately parted to pinnate, the lower pinnae reniform 

 to orbicular, 5-10 mm. long and as wide, cordate at base, un- 

 lobed or shallowly 3-lobed; sori few, nearer the costa or costule 

 than the margin; indusia 1-2 mm. long. Lowlands and 



