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kit C1ACE I 



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Obdbb XV. RICCIACB I I rtb. 



Rio 



1 



I ' 



Terrestrial herbs, of diminutive size, inhabiting mud or « i 

 usually annual, their leaves and bu in-, blended into a frond of a ccllul 



creepii or pur] ! 



th, w itli a distinct i ; 

 and :i cavity of ail , 



1.. :itll it in BOm< 



<ii:i immersed in the frond, with 

 their mouth projecting in the form 

 ^V^ of ;t papilla, or a bIi odi r 

 Pistilbduv in the frond of •• 

 or :i different individual, immi 

 or superficial, - 

 the common involucre i ithi r i 

 ing or scaly ; the iuvoluc* 

 or in the form of little bladders perforated at the poinl 



membranous, united to a calyptra, or distinct from it, glol 

 bursting irregularly when ripe. 5 triangular, pyramidal, 



half round, without elaters. Endl. 

 These little plants form a plain transition from Thailogens to Acrogens. Thej 

 that combination of leaves and Btem into what i- called a frond, which is char* 



of Lichens, and their spon b maj be i • I 

 compared to the tetraspores of the R 

 order. But, on the other hand, ; ; 

 lected in large numbers within organs resembling 

 the pistils of phsenogamous plants ; the} I 

 tiin-t a\i- of growth, and an epid< rmis is distinctly 

 formed with Btomates for breathing with. 

 / ■, I.e.) While, however, latter 



■ 

 in thi organization than Lid milar 



plants, they are inferior t" Liverworts and S 

 the abs 

 ings called elaters, by which, in the hit t. i 

 the spores are dispersed; and to Split-mosses and I'm m. - 

 because they want the complicated apparatus which i- i 

 the Bpon ; those ordi rs, under the form i I 



curam, or peristome. According to Endhcher, tl 

 i t XXVII . pass through Corsinia into the tribe of Liverworts, and bj 



carpus into that of Scali mi . Th< re is a il 



Unger, of the anatomy of Riccia glauca, in the / I. \iii. p. I. I 



Duris9a is regarded \<\ Messrs. Borj and Montagm as forming the i 

 l rerworts ; they describe it as fructifying under water, which is i 

 with the other » tystalworts. .1 nn. S . N. 9 • ■. i. 



Of the Bpecies hitherto known, two-thirds have been obsen 

 remainder in various parts of the world. Several Bpecies in 

 of Good Hope, and BrazQ, appear to be very similar to th 

 The u- s of ( irystalworte are unknown. 



.! i; \ 



Duricea, B. .S Mont. 



\. Mil h. 

 Lichenoides, B 

 lUcciella, -i. Bratm. 



■ 



■ 

 Saivimella, Bobn. 

 //.toiiii, Raf. 



liu. • nhv 



i 



i 



Numbers. < : 



/ 

 Position. Bryacea B 







Pig. XXX vi.- i. Riccia ■ 

 open : 3. spores. 



Pig. \\\vii - Riccia glauca. i I you 

 <ii the mother cell. 



