46 



This species is found in the south-west part of Japan, growing pend- 

 ent on the trunks of trees or the surface of rocks in shady places. It is 

 distinguished from H. javanicum Spreng., principally by the form of the 

 frond, and its manner of sustaining the numerous sporangia on the recep- 

 tacular column, 



Trichomanes thysanostomum Makino Contr. Stud. Fl. Jap. in Bot. 

 Mag., Tokyo, XII, 1898, p. 193. 



Caudex very short, erect, with dense scales at the crown ; scales 

 flbrillose, fuscous-black, one-costate, lj — 2jmm long; roots dense, hard, 

 wiry, black, nigro-tomentose, with short rootlets. Stipes tufted, several in 

 number, shorter than the frond, ascending, elongate, terete, strong, hard, 

 dark, hairy at the base, dispersed with very minute glandular adpressed hairs 

 and then nearly naked, with extremely narrow r ed marginal-line on both sides, 

 6 — 16 cm long. Frond quadripinnatifid or more decompound, narrowly 

 ovate, 10— 28cm long, 4— 15cm broad, rigid in texture, deeply olivaceous-green 

 when dry, scattered with minute adpressed glandular scaly hairs on rachis 

 and nerves beneath; pinme alternate, erect-patent, 6 — 10 on each side, 

 moderately close-placed, ovate-lanceolate, attenuate above, with numerous 

 pinnules, very shortly petioled, with very narrowly winged and filiform 

 rachis, largest ones about 12cm in length ; pinnules erect-patent, triangular- 

 rhomboidal, cimeate at the base, very shortly petiolulate, or subsessile, cut 

 down to the very narrowly winged filiform rachis into several segments ; 

 segments deeply pinnatifid into a few or several ultimate divisions which are 

 simple or bifurcate and straight or circinato-curved, linear-filiform, one-nerved, 

 refuse at the apex, §— |mm in breadth ; main rachis slender, hard, mar- 

 gined with very narrow wings on both sides throughout. Sori small, 1 — 6 

 to a pinnule, terminating the inner lowest ultimate division of the segments, 

 quite sunk in the frond which forms very narrow wings on both sides of each 

 sorus ; involucre subcylindrical, tapering towards the base, a little compressed; 

 very thinly sparse with ascending and adpressed clavate minute glandular 

 scaly hairs, the mouth not dilated, connecting into two lateral obtuse pro- 

 jections, the edge fringed with clavate glandular appendages ; receptacular 

 column cetaceous, much exserted beyond the mouth, longest ones being 

 about 1cm in length ; sporangia minute, with laterally compressed large ring. 



Trichomanes apiifolium Makino H. Kuroiwa's Collections of Liukiu 

 Plants in Bot. Mag., Tokyo, VIII, 1894, p. 412, non Presl, excl. syn. 



Nom. Jap. Kamhinobii-horagoke (Y. Tashiro). 



Hab\ Byukyu (Loochoo) : Kunchan in Isl. Okinawa (Y. Tashiro ! 

 herb. Sc. Coll. Imp. Univ. Tokyo, April 1887), Yaeyama Archip. (F. 



