72 ART. 4. — SHUTAI OKAMUEA : 



nodulosa. Sporae c. 9-12,« magnae, fuscescentes, laeves vel leviter 

 scabridae. Oper cur um e basi conica acute apiculatum, c. 0.64 mm. 

 longum et c. 0.56-0.72 mm. diam. Calyptra cuciiUata, c. 2.-2.3 

 mm. longa, pallida apice fusca, laevis. 



Formosa : Prov. Tailioku-chö, Honkeirai [^ g| ^], Shabösan [;<b ijij Uj] 

 (Leg. Yaichi Shimada ! 2. I. 1914.). 



Nomen speciei in honoren Coli. Dom. Yaichi Shimada. 



SEMATOPHYLLACEAE. 



Rhaphidosteglum argiitum Sh. Okamura. sp. nov. 



Habitat in truncis. Plantae robustiusculae, caespitosae, lutes- 

 centi-virides, sericeae, rigidiusculae. Caulis elongatus, repens, c. 

 2-4 cm. longus, hie illic fasciculatim fusco-radiculosus, densiuscule 

 subirregulariter pinnatim ramosus, sectione oblongus, c. 0.2x0.16 

 mm. magnus, fasciculo centrali nullo, reti centrali aureo, cellulis 

 tenellis rotundato-hexagonis c. 20-30/^ magnis, cellulis periphericis c. 

 3-4-seriatis c. 10/^ magnis fusco-aureis ; ramis patulis, brevibus c. 

 3-5-7 mm. longis simplicibus vel rarius c. 10 mm. longis et parce 

 ramulosis, apice obtusis ; caulibus ramis ramulisque densiuscule 

 foliosis complanatis, cum foliis c. 1.5-2.0 mm. latis. Folia sicca 

 vix mutata, madida patula, liaud liomomalla, valde concava, oblon- 

 go-lanceolata, in acumen subcanaliculatum saepe leviter flexuosum 

 attenata, c. 1.1-1.4-1.6 mm. longa et c. 0.35-0.56 mm. lata, 

 marginibus ultra medium revolutis, e medio ad apicem grosse 

 serratis ; nervis nullis vel subnuUis ; cellulis auguste prosenchy- 

 maticis c. 80-140 />« longis et c. 5-7 /^ latis, superioribus brevioribus 

 c. 50-70 /^ longis, basilaribus infimis abbreviatis c. 30-40 /^ longis 

 aureis, alaribus aureis 3-4 magnis rectangulis subvesiculosis c, 

 50-80/^ longis et c. 20-25 /i latis, supraalaribus quadratis c. 25/^ 



