( Vol-.VI, 1*121 ) ri!A.\/ STKIMIA.M. .sl-KCJKS IIKI'ATir,A liTM /'/(n/ior/lila- 



basin luido, celerum regularilcr valideque spinoso, niargine 

 infero substricto, nudo, sub apice j)aucidenticulato, apice ipso 

 truncato-rotundata, grosse quadrispina. Cellulse superx 18 x 18 {j., 

 basales 18 x 45 jj, parietibns ubique vaiidis. Perianlfiia oblongo- 

 obconica, ore rotundato regulariter denseque spinoso. Folia floralia 

 caulinis duplo majora, ceterum simillima, spinis validioribus. 

 Andrcecia desunt. 



Hab. Sikkiin Himalaija (DecoJN'^ et Schaul leg.). 



257. Pla(|iochiia 1'earsoni St. n. sp. 



Sterilis mediocris flaccida, intense viridis, in rupibus humidis 

 laxe csespitans. Caulis ad 5 cm. longus, surperne regulariter 

 bipinnatus, ramis primariis 3 cm. longis, late divergentibus, 

 pinnulis 1 cm. longis, sparsis remotis. Folia caulina imbricata, 

 oblique patula, parum concava, in plano lingulata, symmetrica 

 (3,5 mm. longa, medio infero 2,25 mm. lata) basi utrinque breviler 

 decurrentia, margine supero e basi leviter rotundata substricto, 

 inferne nudo, superne paucidenticulato, margine infero substricto 

 vel leviter arcuato, sub apice paucidentato, apice ipso truncato- 

 rotundata, 1 mm. lata, similiter armata. Cellulae superge 18 x 18 a 

 trigonis majusculis, basales 27 x 36 tj„ trigonis magnis acutis. 



Hab. Africa orientalis. Tanganjika (Guilleme legit). 



258. Plagioeliila punyons St. n. sp. 



Sterilis major flaccida, pallide flavo-virens, terricola, laxe 

 csespitans. Caulis ad 4 cm. longus, simplex vel furcatus. Folia 

 caulina contigua, oblique patula, canaliculatim concava, in plano 

 anguste lanceolata, symmetrica, inferne nuda, superne utrinque 

 paucisetosa, retulis angustis, apice truncata, 0,75 mm. lata, grosse 

 quadrifida, laciniis porrectis angustis longe attenuatis. Cellulse 

 superse 18 x 54 jj., basales 18 x 72 jj., parietibus validis. 



Hab. Ecuador (Allioni legit). 



259. Placfiochila Pitardii St. n. sp. 



Sterilis mediocris flaccida gracillima, pallide-flavicans, setate 

 fusco-brunnea, in rupibus intricatim csespitans. Caulis ad 6 cm. 

 longus, parum longeque ramosus, ramis 15 mm. longis attenuatis, 

 Folia caulina remotiuscula, oblique patula, decurvo-homomalla, 

 canaliculatim concava, in plano late trigona (1,5 mm. longa, 

 supra basin 1,33 mm. lata) asymmetrica, margine supero semiro- 

 tundo, regulariter valideque spinoso, margine infero stricto nudo, 



200 



