Dec. 1912 J T. MAKlIflO.— OBSERVATIONS ON THE FLOE A OF JAPAN. 385 



Nom. Jap. Ryubintai-modoki (nov.)- 



Hah. Ogasawara Islands ( = Bonin Islands) : Haba-shima 

 (S. Tamaki ! August 24, 1912). 



Distrih. Moluccas and Luzon. 



This genus is new to the Flora of Japan. For the materials 

 my thanks are due to Mr. S. Tamaki. 



Osmunda nipponica Makino, sp. nov. 



Frond (sterile) bipinnate, chartaceo-membranaceous, green 

 above, paler and veiny beneath, 52 cm. long and 13 cm. wide 

 in my specimen, stipitate, erect, oblong-lanceolate in outline, 

 attenuated at the apex ; rachis slender, naked, stramineous ; 

 pinnee opposite or subopposite, erect-patent, about 8 on eacli 

 side, very shortly petiolulate, ovato-oblong, obtuse at the apex, 

 truncate at the base, glabrous, attaining about 9 cm. long, 5 

 cm. broad ; rachilla narrowly winged ; pinnules subnumerous, 

 closely arranged, spreading but erect-patent above, sessile and 

 subobliquely rounded at the base, but adnate and confluent 

 towards the apex, larger in the terminal one, narrow-oblong, 

 obtuse at the apex, obscurely minutely crenulated, the larger 

 ones about 25 mm. long, 10 mm. w^ide ; midrib delicate, prom- 

 inent beneath ; veins erect-patent, close, fine, conspicuous 

 beneath, mainly bi-furcate at the base, and sometimes the 

 branches again bi-furcate. 



Nom. Jap. Ko'zenmai (nov.). 



Hah. Prov. Kodzuke : Summit of Peak Kurohi on Mt. 

 Akagi (F. Uhara ! August 1909). 



A sub-alpine species having a close resemblance to Osmunda 

 bipinnata Hook, of Hongkong in the frond. 



Polystichum craspedosorum (Maxim.) Diels in Engler 

 et Prantl, Nat. Pfl.-Fam. I. 4 (1902), p. 189. 



Aspidium craspedosorum Maxim, in Mel. Biol. YII. p. 34-1 ; 

 Baker in Hooker's Ic. PI. tab. 1655 (1886) ; Makino, Phanerog. 

 et Pterid. Jap. Ic. 111. I. tab. 44. 



var. dissectum Makino, var. nov. 



Pinnae pinnati-parted ; lobes oval to broadly linear, erect- 



