36 Hymenophyllaceae; Pteridaceae 



subglabrous, palmately and irregularly parted to lobed, the margin. Hokkaido, Honshu, Shikoku, Kyushu. ^Korea, 



segments hnear, 0.5-1 mm. wide, entire, very obtuse; indusia Manchuria, Formosa, China to Malaysia, 

 few, tubular, dilated at apex, entire, obscurely papillose on 



5. CREPIDOMANES Presl Ao-horagoke Zoku 



Usually epiphytic; rhizomes filiform; fronds small, usually pinnately compound, rarely digitately divided by reduction, 

 glabrous, the ultimate segments entire, with intramarginal or irregular false veinlets (striae); indusia obconical to trumpet- 

 shaped, winged, with an extruded receptacle from a bilobulate mouth. About 12 species, Madagascar to Japan and Polynesia. 



lA. Ultimate segments o£ frond obtuse 1. C. latealatum 



IB. Ultimate segments of frond very acute to subacuminate 2. C. ma\inoi 



1. Crepidomanes latealatum (v. d. Bosch) Copel. 2. Crepidomanes makinoi (C. Chr.) Copel. Tricho- 



Trichomanes latealatum v. d. Bosch; T. bipunctatum sensu manes ma\inoi C. Chr.; T. acutum sensu auct. Japon., non 



auct. Japon., non Poir. Ao-horagoke. Rhizomes fill- Poir. Koke-horagoke. Rhizomes capillary, branched, 



form, 0.2-0.3 mm. across, loosely branched, densely blackish densely dark brown short-hairy; fronds 2-4 cm. long; stipes 



hairy; fronds 3-10 cm. long; stipes 7-25 mm. long, winged, 3-15 mm. long, winged at the top; blades broadly ovate to 



with blackish hairs at base; blades narrowly ovate, 2-7 cm. broadly lanceolate, 15-25 mm. long, prominendy cuneate at 



long, 1.5-2 mm. wide, nearly glabrous on both sides, the rachis base, bipinnately or sometimes pinnately parted, the rachis 



winged; pinnae sometimes subbipinnately parted, the ultimate winged; pinnae obliquely ascending, 2- to 5-parted, the seg- 



segments 0.7-1 mm. wide, entire, obtuse; indusia obovoid, ments linear-lanceolate, 1-1.5 mm. wide, acute to subacumi- 



about 1.5 mm. long, winged on lower half of both margins, nate, entire; indusia few, winged only at base, obovoid, nearly 



bilobed to the middle, the lobes semirounded-deltoid, very ob- 2 mm. long, 2-lobed to the middle, the lobes deltoid, acutish to 



tuse, entire. Honshu (Uzen and Rikuzen Prov. southw.), obtuse, entire or undulate. Honshu (Kanto Distr. and 



Shikoku, Kyushu; rather rare. Ryukyus, Formosa to Ma- westw.), Shikoku, Kyushu; rare. 



laysia. 



6. SELENODESMIUM Copel. Oni-horagoke Zoku 



Terrestrial, with stout short-creeping to erect rhizomes; stipes elongate with short deciduous bristlelike hairs; blades pinnately 

 compound; pinnules pinnatifid, the cell walls typically thick and coarsely pitted; indusia cylindric, with an entire mouth, the 

 receptacle extruded. About 19 species, in the Tropics and New Zealand. 



1. Selenodesmium obscurum (Bl.) Copel. Tricho- natiparted, the rachis wingless, with short scurfy hairs and 



manes obscurum BL; T. cupressoides sensu auct. Japon., non scattered multicellular jointed hairs; pinnae rather numerous, 



Sw.; T. rigidum sensu auct. Japon., non Sw. Oni-hora- broadly lanceolate, narrowed at tip; pinnules oblong, pinnately 



GOKE. Rhizomes short-creeping or ascending, 2-3 mm. parted, the ultimate segments linear, 0.2-0.4 mm. wide, obtuse 



across, rather densely leafy, with blackish lustrous straight to subacute, suberect; indusia narrowly tubular, about 2 mm. 



hairs about 2 mm. long; fronds tufted, erect, 15-30 cm. long; long, shallowly bilobed at apex, the lobes deltoid-rounded, 



stipes wiry, terete, not winged, with blackish hairs especially ciliolate. Kyushu (Yakushima); rare. Ryukyus, For- 



toward the base, dark brown, 1-1.2 mm. across; blades dark mosa to India and Malaysia. 

 green, narrowly ovate, 7-17 cm. long, 3.5-7 cm. wide, 3-pin- 



Fam. 12. PTERmACEAE I-no-moto-so Ka Pteris Family 



Usually terrestrial; rhizomes creeping, ascending, or sometimes nearly erect; fronds usually pinnate, not jointed with the 

 rhizome; sori typically marginal and indusiate or exindusiate, the reflexed margin of the pinnules often enclosing the sori, or 

 the sori rarely along the veins and exindusiate; sporangia sometimes covering the entire undersurface of the pinnules, opening 



by a transverse slit through a definite stomium; annulus longitudinal and interrupted in most genera. A cosmopolitan family, 



with about 63 genera and about 1,500 species. 



lA. Indusia present. 



2A. Indusium opening exteriorly. 

 3A. Ultimate pinnules not dimidiate. 

 4A. Ultimate pinnules not cuneiform. 



5A. Sori marginal 1. Dennstaedtia 



5B. Sori intramarginal 2. Microlepia 



4B. Ultimate pinnules usually cuneate at base 5. Spkenomeris 



3B. Ultimate pinnules dimidiate 4. Lindsaea 



2B. Indusium consisting of the reflexed margin of the segment. 

 6A. Rhizomes hairy, not scaly. 



7A. Sori not continuous along the margin 6. Hypolepis 



7B. Sori continuous along the margin 7. Pteridium 



