m r^ a- m ^ r. j^ + B 



THE BOTANICAL MAGAZINE. 



[ Vol. V. Feb. lo, 1891. No. 48.] 



A New Japanese Polypodium. 



Kyokichi Yatabe^ Sc. D. 



Polypodium Okuboi, sp. nov. 



Nom.Jap. Okiibo-shida. i^ ?i^ ^ t* ^y ^ 



(Plate XXI.) 



Rhizome small, erect, 1-2 mm. long, sending out numerous fine branched 



roots. PVonds rosulate at the apex of the rhizome, perennial, subcoriaceous, 



pale green, pinnatifid deeper than midway between the margin and costa, 



oblong-lanceolate, oblong-linear, or linear, tapering at the base into a short 



stipe, pilose on both surfaces, usually 1-2 cm. long, sometimes 5 cm, long, 3-5 



mm. broad. Lobes 4-20 on each side of the costa, oblong or ovate, entire, 



obtuse, I -I J mm, long, J-i mm. broad. Veins proceeding from the costa, 



simple, subclavate at the apex, terminating below the apex of each lobe. Sod 



on the back of the vein, globose, in 2 series, one at the base of each lobe. 



This fern was found by Mr. Samuro Okubo at a certain locality near Ashi- 

 noyu in the Hakone mountain, and was collected by him at different times, the 

 last in October, 1890. It was found growing on old stone- avails and tomb- 

 stones in dry situations. The altitude of the locality is about 3000 feet. 



The short rhizome is furnished with small scales, which are lanceolate or 

 linear-lanceolate in outline and brown in color ; the larger of them are about 1.5 



