361 



SPECIES HEPATICARUM 



Franz STEPHAN I 



(Suite.) 



B. RICCIELLA 



IX. Frons tenerrima, membranacea. 



84. Riccia membranacea G. et L. Syn. Hep., p. 608. 

 R. tennis Austin. Acad. Phila. 1869. p. 233. 



R. lanigera Spruce. Bot. Soc. Edinb. 1885, p. 570. 



Dioica, major, viridissima, nitida, pro more subcœspitosa ; frons usque 

 ad 10 mm. longa, laie obcuneata, apice breviter furcata, furcis late trun- 

 cato-rotundatis, tenerrima, in sicco chartacea, fragillima. lamellis anosto- 

 mosantibus optime reticulata; costa 2 celhilas crassa, Stratum aëriferum 

 humillimum, poris magnis spar sis, marginibus unam cellulam crassis. 

 Sporœ dilute rufescenles 42 ja, haud reticulalœ, ubique dense breciterque 

 setosse. 



Hab. Brasilia (Spruce, Ule), Mexico (Liebmann), America sept. (Austin). 



85. R. Welwitschii St. n. sp. 



Dioica, major, fiavo-virens, expansa vel substratificata. Frons usque ad 

 6 mm. longa, oblongo-obcuneata. apice breviter furcata, furcis brevibus 

 divergentibus, profunde bilobis ; tenais, ob lamellas perlucentes auguste 

 reticulata; costa minima, paucas cellulas alta, fronde subtriplo angustior, 

 alis itaque costam latissime superantibus, marginibus tenerrimis; Stratum 



bull. herb. Boiss., mai 1898. 36 . 25 



