16 



Athyrium Okuboanum Makino nora. nov. 



Rhizome short, creeping, rooting, armed with stout and thick bases of 

 former stipes, young portion clothed with tawny-brown membranaceous 

 scales. Stipe long, robust, stramineous, fleshy, very laxly dispersed with 

 brown and membranaceous scales, longest ones about 70 cm. Frond ample, 

 narrowly ovate, acuminate, tripinnatifkl, very thinly scattered with very minute 

 scaly hairs, thin, herbaceous, largest ones about 60 cm long, 32 cm broad. 

 Pinnce erect-patent or spreading, usually nearly opposite, 10-13 on each 

 side of the rachis, rather distant, very shortly petioled, but sessile in the 

 superior ones, oblong-lanceolate, superior ones gradually narrower, acuminate, 

 pinnatipartite forming narrow wings on both sides of the secondary rachis, 

 which is very laxly distributed with darkish-brown scales, longest ones about 

 28 cm, and broadest ones about 11cm; pinnules numerous, horizontally 

 patent, slightly distant from one another, but superior ones more closely 

 placed, lanceolate, connected to the narrow rachis-wing with a broad sessile 

 bases, narrowly attenuated towards the apex, but gradually becoming obtuse 

 and oblong in the superior ones and gradually decresing in size, piimatind 

 about halfway down to the costa, merely crenate in the superior ones, but 

 sometimes crenate throughout in some specimens ; segments numerous, closely 

 placed, ovate, obtuse, entire ; veins pinnate ; veinlets few or several, free, simple, 

 loose ; main rachis slender, stramineous, very laxly scaly. Sori copious, 

 rather conspicuous, ovate or orbicular, horseshoe-shaped, unequal in size, 

 arranged nearer to the costa than to the margin of pinnules, each dorsal 

 on the lower part of the inferior veinlets; indusium very thin, subfimbriate 

 on the margin. 



Aspidium Okuboanum Makino Notes' on Jap. PI. XV. in Bot. Mag., 

 Tokyo, VI. 1892, p. 47. 



Asplenium Okuboanum Makino in sched. herb. 



Nom. Jap. O-liime-warabi (T. Makino). 



Hab. Prov. Tosa : Near Mt. Tebako-yama (T. Makino ! Aug. 1885), 

 Kitagawa in Nanokawa (T. Makino ! Nov. 3, 1887); Prov. Musashi: 

 Chichibu (T. Makino \ July in, 1888); Prov. Uzen : Yamadera (S. Okubol 

 herb. Sc. Coll. Imp. Univ. Tokyo, July 14, 1890). 



In general habit this resembles Gymnogramme decurrenti-olata Hook. 

 It is easily recognized by its rounded and horseshoe-shaped sori, on account 

 of which I have formerly ranked this species erroneously among the genus 

 Aspidium ; it comes near to above described Athyrium viridifrons 

 Makino, but is more robust. I have named it in honour of Mr. S. Okubo. 



{To be continued.) 



