80 



Nephrodium erythrosorum Hook. ( = Aspidium erythrosorum Eat.) is 

 unquestionably a variable species, and the present variety and eysto- 

 lepidotum (Miq.) Maxim., stand near the iypica. 



Nephr odium (Lastrea) monticola Makino sp. nov. 



Caudex thick, oblique. Stipes caespitose, stout, thick, herbaceous, rufo- 

 stramineous, scaly throughout but much denser towards the base, shorter than 

 the frond ; scales : basal ones oblong-lanceolate to linear-lanceolate, acuminate, 

 entire, firmly membranceous, shining, castaneous-brown, pellucid towards the 

 margin, with very closely finely and longitudinally arranged areolae, largest one 

 24 mm long, 6 mm broad ; upper ones smaller than the basal ones, linear- 

 lanceolate -or subulate-lanceolate, acuminate, entire, rufous, thinly membra- 

 naceous. Frond ovato-oblong or narrowly oblong, rather abruptly and shortly 

 acuminate, herbaceous, bipinnatipartite, 37-60 cm long, 23-29 cm broad, 

 naked above, dispersed with small deltoid-ovate acuminate rufous thinly 

 membranaceous scales along the rachis of pinnae and the costa of pinnules ; 

 rachis slender, herbaceous, rufo -stramineous, covered with ovato-lanceolate or 

 narrowly deltoid entire often crispate thinly membranaceous rufous scales ; 

 pinnae about 12-18 on each side, the middle ones largest, spreading or 

 erect-patent, alternate or subopposite, moderately closed, very shortly petiolate, 

 lanceolate, acuminate, eut nearly down to the stramineous and slender 

 rachis where forming a very narrow wing on both sides of them, but pin- 

 natitid at the apex, largest one about 19 cm long, 4 cm broad ; pinnules 

 numerous, regularly arranged, spreading, narrowly oblong, obtuse with an 

 acute point, serrato-lobed with a cuspidate tip and often a sharp tooth, but 

 sharply tipped serrate in the superior ones, broadly aclnate to the rachis- 

 wing, but lower ones more or less abruptly reduced into an obtuse base, 

 largest one 2 J cm long, j cm wide ; veins erect-patent, flexuous, pinnate with 

 1 to 4 veinlets ; veinlets free, loose, mostly simple, or bifurcate. Sori in 2 

 series near the costa of pinnules, solitary and dorsal on the lower part of an 

 upper lowest veinlet, 1 to 18 to a pinnule, a little remote from one another, 

 distinct, orbicular ; indusium orbicular, with a close and deep sinus, subcoriaceo- 

 membranceous, entire, about 1J mm across. 



Nom. Jap. 31iyama-benishida (T. Makino nom. nov.) 



Hal). Prov. Musashi : Mt. Buko-zan in Chichibu ( T. Mahino ! July 

 20, 1888). 



In general habit this species has a resemblance to Nephrodium Goldie- 

 anum Hook., a North- American Fern, being inter media te between N. 

 erythrosorum Hook, and N. Filix-mas Rich. 



