2? 



Asplenium crenulatoserrulatum Makino in scned. herb. Sc. Coll. Imp. 

 Univ. Tokyo. 



Nom. Jap. O-miyamainuworabi (Z. Matsumura). 



Hob. Prov. Shinano : foot of Mt. Komagadake (Z. MatsumuraA 

 herb. Sc. Coll. Imp. Univ. Tokyo, Aug. 2, 1880); Prov. Echigo: Mt. 

 Shimidzu-toge (T. Makino ! Sept. 1888) : Prov. Musashi : Mt. Yokami-yama 

 (T. Makino ! July 16, 1888). 



This species is nearly allied to Athyrium crenatum Rupr., which is 

 also found in Japan, but the veinlets of the segments simple or 2-forked; 

 the segments minutely crenula to-serrulate on margin ; the sori muchjsmaller 

 and more copious ; the outline of the frond deltoid verging to the ovate 

 figure ; and the scales of the rhizome and stipe rufous-brown. 



Forma hakonense. 



Frond smaller, deltoid ; ultimate segments broader, with obscure serra- 

 tion. Sori larger and longer. 



Hob. Prov. Sagami: Mt. Hakone (S. 0kubo\ herb. Sc. Coll. Imp. 

 Univ. Tokyo). 



Athyrium rigescens Makino sp. nov. 



Caudex stout, thick, ascending, densely rooting. Stipes tufted, long, 

 slender, usually shorter L~than the frond, stramineous, nearly naked, 

 but densely scaly at the base ; scales fuscous-black, linear, *-l cm long, 

 gradually acuminate, entire, with longitudinal areolae Frond subdeltoid- 

 ovate, 22-55 cm long, 15-30 cm wide, acuminate, bipinnate, but bipin- 

 natifid at the apical portion, naked, rigidly herbaceous ; pinnas spread- 

 ing, 12-15 on each side, narrowly lanceolate, often somewhat falcate, 

 acuminate, pinnate, but pinnatind at the apical portion, very shortly petioled, 

 1-3 cm broad, but largest one when well developed about 20 cm long, 

 4 cm broad, slightly apart from one another, secondary rachis stout- 

 filiform, narrowly canaliculate on the upper side, with a spine at the 

 base of pinnules, usually purpurascent as well as the main rachis ; pinnules 

 spreading, usually approximate one another, very shortly petiolulate, sub- 

 dimidiato-ovate-oblong, \-2\ cm long, 2-10 or more wide, with a few 

 spines on the costa in the upper surface, unequally acutely serrate, inferior 

 ones sometimes inciso-lobed, acute at the apex, obliquely cuneate at the 

 base, in the upper lower side with a pauciserrate auricle which is parallel 

 to the rachis in the inner side, pilose at the base of the petiolule ; rachis 

 slender, naked, canaliculate on the front side as is the stipe ; veinlets 

 2-forked, but simple in the upper and pinnate in the lower, erect-patent, 



