Pteridaceae 37 



6B. Rhizomes scaly, sometimes also hairy. 



8A. Sori protected by but not borne on the indusium. 

 9A. Veinlets joined in the sori. 



lOA. Ultimate pinnules 3-20 mm. wide; marginal indusia not in contact with the adjacent side by the strongly reflexed margins. 



1 1 A. Rhizomes long-creeping, solenostelic; fronds remote 8. Histiopteris 



11 B. Rhizomes short, dictyostelic; fronds tufted 9. Pteris 



lOB. Ultimate pinnules 1-1.5 mm. wide; marginal indusia strongly reflexed, the adjacent indusia often in contact along the 



midrib beneath, especially when young 14. Onychitim 



9B. Veinlets free. 



12A. Fronds often dimorphic; alpine 13. Cryptogramma 



12B. Fronds all alike; hills and lowlands. 



13A. Fronds farinose beneath; rachis nearly smooth 12. Aleuritopteris 



13B. Fronds not farinose beneath; rachis with 2 raised prominently scaly ridges on upper side 11. Cheilanthes 



8B. Sori borne on the reflexed margin of the pinnules 16. Adiantum 



IB. Indusia absent. 



14A. Sorus rounded, not elongate. 



15A. Blades membranous, glabrous, often with bulbils in axils of the pinnae or proliferous at the tip 3. Monachosorum 



15B. Blades herbaceous, pilose, without bulbils, not proliferous at the tip 6. Hypolepis 



14B. Sorus elongate along the vein, superficial. 



16A. Fronds 3-7 cm. long, the blades hairy 15. Pleurosoriopsis 



163. Fronds 70-130 cm. long, the blades glabrous or thinly hairy 10. Coniogramme 



1. DENNSTAEDTIA Bernh. Koba-no-ishi-kaguma Zoku 



Terrestrial; rhizomes creeping, hairy, solenostelic; fronds large, pinnately compound, hairy or naked, the pinnules oblique; 

 veins free; sori marginal, usually in the sinuses at the ends of the veinlets; indusia fused with a minute tooth of the frond to 



form an entire or slightly bivalved sometimes deflexed cup; sporangia slender-stalked. About 70 species, of wide distribution, 



mainly in the Tropics. 



lA. Fronds deciduous, somewhat dimorphic, broadly lanceolate, bipinnatiparted or bipinnate; lowest pinnae not or only slightly larger 

 than the others, less than 10 cm. long. 



2A. Fronds glabrous \. D. wiljordii 



2B. Fronds pubescent 2. D. hirsuta 



IB. Fronds evergreen, all alike, narrowly deltoid, 3- or 4-pinnate; lowest pinnae largest, 10-30 cm. long 3. £>. scabra 



1. Dennstaedtia wilfordii (Moore) Koidz. Microlepia nearly pinnate, slighdy unequal at base; ultimate pinnules ob- 

 wiljordii Moore; DaualUa wiljordii (Moore) Bak.; Coptidi- long-ovate, 3-10 mm. long, obtuse, acute- to mucronate- 

 pteris wiljordii (Moore) Nakai & Momose; Davallia nipponica toothed; sori marginal; indusia cup-shaped, pale brown, prom- 



Miq.; M. nipponica (Miq.) C. Chr. O-ren-shida. Rhi- inently hispid on the underside, green above, about 0.7 mm. 



zomes slender, creeping, sometimes stolonlike, 1-1.5 mm. across. ^May-Oct. Hokkaido, Honshu, Shikoku, Kyushu; 



across, with brownish multicellular jointed hairs while young; common. Korea, Manchuria, and China. 



fronds slighdy dimorphic, glabrous, the sterile ones usually 3. Dennstaedtia scabra (Wall.) Moore. Dic^sonia sca- 

 smaller than the fertile; stipes 3-20 cm. long, pale green in bra Wall, ex Hook.; Dicf(sonia deltoidea Hook.; Dennstaedtia 

 upper part, purple-brown or dark brown and lustrous toward deltoidea (Hook.) Moore KoBA-No-isHi-KAGUMy\. Ever- 

 base, grooved on upper side; blades membranous, broadly green; rhizomes long-creeping, 2-3 mm. across, hairy at least 

 lanceolate, 7-25 cm. long, 2-6 cm. wide, acuminate to acute; while young; fronds more or less scabrous; stipes reddish 

 fertile pinnae deltoid-ovate, acute or obtuse in the sterile brown to dark brown-purple, prominently scabrous at base, 

 pinnae, short-petiolulate; ultimate pinnules usually cuneate at 15-40 cm. long, somewhat shiny, grooved on upper side; blades 

 base, broadly lanceolate to ovate in the fertile ones, ovate to narrowly deltoid, 20-45 cm. long, 15-35 cm. wide, acuminate, 

 broadly ovate in the sterile, obtusely toothed; sori marginal; green above, slighdy paler beneath, 3- or 4-pinnate, the rachis 

 indusia cup-shaped, membranous, glabrous, entire, about 1 brownish, sparsely hispid on both sides; pinnae deltoid-lanceo- 



mm. long and as wide. June-Oct. Hokkaido, Honshu, late to broadly lanceolate, 10-30 cm. long, 4-10 cm. wide, 



Shikoku, Kyushu. Korea, Manchuria, Ussuri, and China. acuminate, short-petiolate; ultimate pinnules oblong-ovate, 7- 



2. Dennstaedtia hirsuta (Sw.) Mett. Davallia hirsuta 15 mm. long, 3-8 mm. wide, obtuse, oblique at base, sessile, 

 Sw.; Humata hirsuta (Sw.) Desv.; Microlepia hirsuta (Sw.) pinnately lobed to toothed, thinly hispid on nerves of both 

 Diels, non Presl; Trichoinanes japonicum Poir., non Thunb.; sides; sori marginal; indusia cup-shaped, about 0.7 mm. across, 

 Davallia pilosella Hook.; M. pilosella (Hook.) Moore; Fujii- the lower side membranous, glabrous, entire, the upper margin 



jilix pilosella (Hook.) Nakai & Momose Inu-shida. Plants more or less incurved. Mar.-Oct. Honshu (Kanto Distr. 



soft-pubescent throughout; rhizomes 1-2 mm. across, short- and Echigo Prov. westw.), Shikoku, Kyushu. Formosa, 



creeping; stolons elongate, remotely leaved; fronds 7-35 cm. China to Malaysia and India. 



long; stipes 3-15 cm. long, stramineous, grooved on the upper Var. glabrescens (Ching) Tagawa. D. glabrescens Ching 



side; fertile blades herbaceous, 15-30 cm. long, 4-8 cm. wide, Usuge-koba-no-ishi-kaguma. Nearly glabrous. Dis- 



acuminate; pinnae broadly deltoid-lanceolate to narrowly del- tributed with the species, 

 toid-ovate, obtuse to subacute, nearly sessile, pinnatiparted to 



