52 



ART. 4. — SHCTAI OKAMURA 



sae, caespitibus late extentis, laete viridibus, serieeis, moUiuseulis. 

 Caulis repens, usque ad 4 cm. longus, hie illic dense fasciculatim 

 fasco-radiculosus, dense et regulariter pinnatini. ramosus, sectione 

 teres, c. 0.2-0.24 mm. diam., fasciculo centrali valde arto pauci- 

 cellulari, reti intermedio hyaline, cellulis hexagonis vel oblongo- 

 hexagonis c. 15-20/^ magnis tenellis, cellulis periphericis c. 3-seriatis 

 minoribus c. 7-15/^ lutescenti-fuscescentibus incrasatis ; ramis pro- 

 stratis, c. 5-7 mm. rarius c. 10 mm. longis, strictis vel curvatulis, 

 simplicibus rarius parce (1-3) ramulosis, dense foliosis subcom- 

 planatis. Folia sicca laxe adpressa, plerumque homomalla, madida 

 patentia, saepe homomalla, haud decurrentia, e basi angusta late 

 vel anguste ovato-oblonga, apice acuto-attenuata vel sensim atte- 

 nuata, c. 1.3-1.5 mm. longa et c. 0.48-0.64 mm. lata, valde con- 

 cava, marginibus e basi ad basin acuminis leviter recurvis, inte- 

 gerrimis rarius apice indistincte crenulatis ; nervis binis, tenellis, c. 

 0.24-0.4 mm. longis ; cellulis valde clüorophyllosis, laevissimis, pro- 



senchymaticis, in medio folii c. 40-50 ^ 

 longis et c. 4-5 /^ latis, superioribus 

 c. 28-40,« longis et e. 4-5/^ latis, 

 basilaribus c. 50-70 // longis et c. 4-7 ,« 

 latis, infimis brevioribus c. 25-40// 

 longis, alaribus numerosis quadratis 

 c. 15-20 [^ magnis valde chlorophyllosis. 

 Inßorescentla autoica ; flores feminei in 

 caule et ramis ; flores masculi in caule ; 

 foha perigonialia intima ovata, apice acuta, c. 0.48 mm. longa et 

 c. 0.24 mm. lata, enervia ; antheridia c. 5, c. 0.2 mm. longa, 

 paraphysibus numerosis, hyalinis, c. 0.24-0.32 mm. longis. Ramulus 

 perichaetialis parce fusco-radiculosus. Bracteae jjerichaetu intimae 

 basi semivaginatae et lanceolatae apice sensim attenuatae, erectae. 



A. X20 



Fig. 23. Pylaisia laeto-viridis. 

 A. FoKa (x20); B. Tbeca (xlO). 



