14 



ART. 4. — SHÜTAI OKAMURA : 



tibus lutescenti-viridibus vel atro-viridibus inferne postea furginosis, 

 haud nitidis, rigidinsculis, densis. Caulls erectus vel decumbens, 

 usque ad 4 cm. altus, dichotome ramosus, fere ad apicem fuseo- 

 radiculosus, sectione teres, c. 0.4-0.5 mm. crassus, fasciculo centrali 

 nuUo, reti centrali lutescenti, cellulis hexagonis c. 20-28 /^ magnis 

 incrassiusculis, ceUulis periphericis c. 4-5-seriatis minoribus luteo- 

 fuscis incrassioribus, superficiali tenuis subhyalinis ; ramis dense 

 foliosis, obtusis, non breve ramulosis. Folia sicca adpressa et leviter 

 crispata, humida erecto- patent ia vel patentia, haud homomalla, 

 lanceolato-elliptica, in acumen breve hyalinum papillosum serratum 

 subcuspidum contracta, c. 2.0-2.4 mm. longa et c. 0.8 mm. lata 

 (acuminibus hyalinis c. 0.12-0.32 mm. longis.), valde concava et 

 ad apicem carinato- concava, marginibus e strato uni-cellularum 

 ubique hortiter revolutis ; nervo valido, infra summum apicem 

 evanido, fusco-luteo, dorso superne papilloso, in sectione transver- 

 sal! plano-convexo, basi c. 85/^ lato et c. 40,« crasso, e 5-stratis 

 ceUularum composite, ducibus medianis 4, cellulis ventralibus c. 5, 

 dorsalibus c. 12 ; cellulis laminalibus valde papulosis, linearibus, c. 



B. X20 



Fig» 6. Rhacomitrium Iwasakii. 



A. Planta (xl); B. Folia (x20); C. Bractea perichaetialia intima (x20); 



D. Sporangia (xlO). 



