26 



obovate-rounded, convex, subfringed on the margin, with very minute 

 longitudinal subsquare areolse. 



Asplenium microsorum Makino Notes on Jap. PI. XV. in Bot. 

 Magas., Tokyo, VI. 1892, p. 46. 



Norn. Jap. Tebako-warabi (T. Makino). 



Bab. Prov. Tosa : Mr. Tebako-yama (T. Makino] S. Yanol Aug. 

 1885 ; T. Inoue [former T. Yoshinaga] ! Aug. 1888 ; li. Yalabe ! herb. 

 Sc. Coll. Imp. Univ. Tokyo, Aug. 1888 ; L Doi ! Aug. 10. 1890). 



A rare species : remarkable for the most decompound frond cut into 

 the copious and small ultimate segments. 



Athyrium crenulatoserrulatum Makino sp. nov. 



Rhizome creeping, rooting, clothed with rufous-brown scales ; scales 

 lanceolate, acuminate, usually entire, sometimes very scantily denticulate, 

 membranaceous, closely veiny, with very finely longitudinal areolae. Stipes 

 approximately scattered, long, stout, herbaceous, laxly clothed throughout 

 with lanceolate acuminate rufous-brown scales. 25-40 cm in length. 

 Frond ample, subdeltoid or ovate-deltoid, thinly herbaceous, tripinnatifid, 

 with about 13 pinnte on each side of the main rachis, 30-45 cm long, 

 30-38 cm broad ; main rachis and secondary rachis laxly sparse with the 

 linear rufous-brown scales, midvein of the pinnules thinly dispersed with 

 hairy scales, and superior portion of the main and secondary rachis as 

 well as midvein of the pinnules very finely pilose beneath as is the costa 

 of the ultimate segments; pinnae erect-patent, often nearly opposite, oblong- 

 lanceolate, shortly petioled, acuminate, pinnate, but pinnatifid at the apical 

 portion, with slender rachis which bears a narrow- winged border on each 

 side above, largest ones about 23 cm long, 9 cm broad ; pinnules numer- 

 ous, horizontally patent, lanceolate, subsessile, but quite sessile in superior 

 ones, subtruncate at the base, shortly acuminate in ;the inferior ones but 

 acute or obtuse in the superior, deeply pinnatipartite, but in the superior 

 ones cut down about halfway to the costa, largest ones 5 * cm long, lgcm 

 broad; segments about 6-13 on each side, nearly or quite horizontally 

 patent, closely placed, oblong, obtuse, or abruptly acute, broadly adnate at 

 the base, crenulato-serrulate with minute teeth on the margin and at the 

 apex, 3-8 mm long, 2- nearly 4 mm broad ; veins spreading, nearly 

 straight, subflexuous, pinnate ; veinlets erect-patent, 1-6 on each side, 

 mostly simple or 2-forked. Sori 1-9 to a segment, minute, broadly 

 elliptical, each situated on nearly the middle of each veinlet ; indusium 

 deciduous. 



