Plagiochasma. franz stepham. spegies hepatigarum. 787 



apice furcata vel ex apice innovala, antice plana, marginibus attenuatis 

 crenulatis plicatulis, ventre purpurea, costa parum prominente. Squanias 

 ventrales magnse, purpureee, imbricatee, appendiculo siibcircidari, hyalino, 

 integerrimo. Stomata parva, poro 6 celluiis circumdato, reliquee cellulee 

 epidermales valde sequaiiterque incrassatse, trigonis magnis. Pedunculus 

 capituli brevissimus, apice longe barbatus, paleis ligulatis, hyalinis, acutis. 

 Capitula vertice profunde excavata, trilobata, lobis vertice cornutis, cor- 

 nua brevia obtusa erecta. Sporae et Elateres desunt. Androecia ignota. 

 Hab. Africa orient. Ligaijo (F. Fischer.) 



25. P. italicum (Sassi.) De Not. Ac. Tor. 1859, p. 476. 



Syn. Anthrocephalus italicus Sassi. Att. sc. it. 1840, p. 160. 

 Aitonia italica Lindb. F. Fl. fenn. IX, p. 291. 



Monoica, minor, gregarie crescens viridis, subtus purpurea. Frons 

 usque ad 1 cm. longa, 5 mm. lata, ex apice innovata vel et latere costse 

 ramosa, crassa, antice plana, postice plano-convexa, cosia parum producta. 

 Stomata parva, poro exiguo, cellulis 4 obconicis circumdato; cellulae 

 epidermidis trigone incrassatse. Sqiiamae posticse sanguinese, magnse, 

 oblique ovatee apice sensim acuminatee, acutse i. e. appendiculo basi haud 

 constricto, e lata basi anguste trigono, ceterum hyalino, interdum gemi- 

 nato vel terno. Carpocephala subsessilia^ pedunculo brevissimo apice 

 longe paleaceo, vertice anguste lunatim exciso-subcornuta. Sporse 76 [i,, 

 Elateres 200 ^, bi-trispiri, spiris arctissime tortis. Androecia rotunda vel 

 oblonga vel furcata, in ramulis femineis flori approximata vel in ramulis 

 posticis omnino masculis, e fronde feminea ortis. 



Hab. Italia Voltri (Baglietto) Mentone (Moggridge). 



— • 26. P. mexicanum Ldbg. et G. Syn. Hep., p. 519. 



Monoica, major, tenera, viridis, postice purpuracens. Frons usque ad 

 3 cm. longa, 7 mm.'Iata, ex apice innovata. Stomata parva, 5 — 6 cellulis 

 obconicis circumdata, parietibus radialibus valde incrassatis, incrassatione 

 stellatim attenuata ; cellulse epidermidis trigone incrassatse. Squamde pos- 

 ticse late semilunatse, abrupte appendiculatse, appendiculo simplici, 

 anguste lanceolato, longe attenuato, duplo fere longiore quam squama. 

 Carpocephala subsessilia, pedunculo apice longissime barbato, bi-vel 

 trilobata, vertice profunde exciso-cornula, cornubus obtusis recurvo- 

 coniventibus. Elateres trispiri, maximi, 450 ]x. Sporx 85 ^. Androecia 

 in ramulis parvis posticis, lateralibus. 

 Hab. Mexico (Liebmann). 



84 



