74 AET. 4. — SHUTAI OKAMUKA : 



Species R. japonico Bkoth. subaffinis, sed marginibiis foliorum 

 e medio ad apicem grosse argutis, inflorescentia dioica, seta 

 longiore, endostomium cilia unica faciliter dignoscenda. 



Nome speciei ab foliis apice argutis. 



Rhaphidostegiinn demissmu (Wils.) De Not. 



Formosa : Prov. Taihoku-chô, Sliabosan (Leg. Yaichi Shimada ! 31. 

 Xn. 1913.). 



Species nova ad floram formosanam. 



Rhaphidostegimn japonicinn Broth. Hedwigia Band 

 XXXYin. p. 230 (1899). 



Habitat in truncis vel rupibus. Plant ae graciles, caespitosae, 

 caespitibus lutescenti-viridibus, sericeis, rigidinsculis, densis, late 

 extentis. Caulis repens, c. 3-4 cm. longiis, hie illic dense fasci- 

 culatim fusco-radiculosus, densiiiscule subirregulariter pinnatim 

 ramosns, sectione teres vel oblongus, c. 0.12-0.16 mm. magnus, 

 fascicule centrali nullo, i^eti centrali luteo, cellulis tenellis hexagonis vel 

 oblongo-hexagonis c. 10-20 /^- magnis, ceUulis periphericis 1-2-seriatis 

 minoribus c. 10/^ magnis, valde incrassatis, fuscis ; ramis c. 6-10 

 mm. longis, patulis, apice obtusis, simplicibus vel parce ramulosis, 

 dense foliosis paulum complanatis. Folia sicca adpressa rarius ad 

 apicem rami indistincte homomalla, madida erecto-patentia, concava, 

 e basi oblonga lanceolata, apice sensim piliformiter attenuata, c. 

 1.3-1.6 mm. longa et c. 0.4-0.45 mm. lata, marginibus e basi ultra 

 medium leviter revolutis, integerrimis ; nervis nullis vel indistincte 

 binis ; cellulis omnibus laevissimis, anguste linearibus, c. 70-80/^ 

 longis et c. 4/^ latis, superioribus brevibus c. 35-50// longis et c. 

 4-6 /^ latis, basilaribus infimis brevioribus c. 40 f^ longis aureis, 

 alaribus 3-5 magnis oblongis subvesiculosis c. 35-56 /^ longis et c. 



