Plagiochasma. franz stepham. species hepaticarum. 775 



plana; Stratum lamelliferuni laxe cavernosum, ca vernis unistratis costse 

 aequialtis. Costa latissima, plano-convexa, haud abrupte producta, infron- 

 dis margines sensim atténua ta. Stoma ta parum convexa, parva, ut in 

 Clevea cellulis in lumen pori convexo-prominentibus substellata, parieti- 

 bus radialibus valde breviterque incrassatis, reliquis cellulis epidermidis 

 vix incrassatis. Squamae posticse magnée, hyalinee vel basi purpureee, e 

 basi semilunata abrupte appendiculatee. appendiculo (rarius 2 vel 3) lan- 

 ceolato. acuminato, apice margineque cellulis clavatis armato. Tnflores- 

 centia paroica vel monoica vel heteroica, Carpocephala terminalia, pedun- 

 culo e rima apicalis orto, ob frondem uno latere increscentem quasi e 

 sinu laterali adscendente, usque ad 15 mm. longo, valido bisulcato, cari- 

 nis humilibus longe decurrentibus obtecto, basi nudo, apice breviter 

 paleaceo. paleis roseis occultis, ex angusta basi lanceolatis, cellulis clavatis 

 numerosis subpinnatae. Receptacula rufescentia, interdum purpurea vel 

 subnigra, disco centrali bene deflnito, convexo-prominulo, lobis normali- 

 ler 6, profunde discretis, contiguis, decurvis, antice obtuse carinatis, 

 crassis; involucra apice breviter bilabiata, labiis postice hiantibus i. e. 

 fissura haud in dorsum involucri adscendente (ut in Clevea). Stoma ta 

 receptaculi antica nulla. Involucra monogyna ; Calyptra tenuis. Capsula 

 sphserica, irregulariter valvatim rumpens, matura vix exserta, pariete 

 unistrata, fibris annulatis instructa. Elateres sulphurei, trispiri 205 p.. 

 Sporee fusco brunneœ, dense papulosse 50 jx. Andrcecia bene definita, dis- 

 ciformia, rotunda vel oblonga vel semilunata, purpurea, paleis brevibus 

 cincta, ostiolis breviter conicis. 



1. P grandis. Lindb. 1. c. 1882. II, p. 4. 



Syn. Preissia quadrata (Scop.) Nées Nat. d. Leb. IY, p. 135 pro parte. 



Peltolepis sibirica Lindb. 1. c. 

 Hab. Alpes Europœ. Tatra (Limpricht), Norvegia, Fennia (Brotherus), 

 Sibiria (Arnell. Sahlberg), Groenland (Yanhöffen). 



PLAGIOCHASMA L. et L. 



in Lehm. Pug. PL IV, p. 13. 



Plantée thallosae, fragiles, majusculae vel magnge, gregariee vel caespi- 

 tosee, ob ramificationem multifariam seepe maxime intricatae, terricolœ 



72 



