Plagiochasma. franz steph.\m. species hepaticarum. 77S 



plana; stratum lamelliferum laxe cavernosum, cavernis unistratis costse 

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

 dis margines sensim attenuata. Stomata parum convexa, parva, ut in 

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

 bus radialibus valde breviterque incrassatis, reliquis cellulis epidermidis 

 vix incrassatis. Squamae posticae magnse, hyalinse vel basi purpurese, e 

 basi semilunata abrupte appendiculatse, appendiculo (rarius 2 vel 3) lan- 

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

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

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

 sinu laterah adscendente, usque ad 13 mm. longo, vahdo bisulcato, cari- 

 nis humihbus longe decurrentibus obtecto, basi nudo, apice breviter 

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

 numerosis subpinnatse. Receptacula rufescentia, interdum purpurea vel 

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

 ter 6, profunde discretis, contiguis, decurvis, antice obtuse carinahs, 

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

 fissura haud in dorsum involucri adscendente (ut in Clevea). Stomata 

 receptaculi antica nulla. Involucra monogyna ; Calyptra tenuis. Capsula 

 sphserica, irregulariter valvatim rumpens, matura vix exserta, pariete 

 unistrata, fibris annulatis instructa. Elateres sulphurei, trispiri 20S ^. 

 Sporae fusco brunnese, dense papulosse 50 |j.. Androecia bene definita, dis- 

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

 cincta, ostiohs breviter conicis. 



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



Syn. Preissia quadrata (Scop.) Nees Nat. d, Leb. lY, p. 135 pro parte. 



Peltolepis sibirica Lindb. 1. c. 

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

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



PLAGIOCHASMA L. et L. 



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



Plantse thallosse, fragiles, majusculae vel magnee, gregariae vel caespi- 

 tosae, ob ramificationem multifariam ssepe maxime intricatee, terricolse 



72 



