Plagiochasma. franz stephani. spegies hepatigarum. 783 



220 [1, flavescenles, omnino solidi lumine nullo flbraque spirali nulla. 

 Andrcecia rotunda vel bifurca, vel in planla propria vel in ejus ramis 

 brevibus posticis. 

 Hab. Mexico (Liebman, Maury, Fr. Miiller, Berendt). 



' 14. P. Wrightii Sull. Musc. Am. t. \1. 



Syn. Aitonia Wrightii Und. Hep. Am. in Ifl. St. Lab. U, p. 43. 



Bioica, mediocris glauco viridis, postice purpurea. Frons usque ad 

 2 cm. longa, ex apice innovata, late ligulata, antice subplana; costa lata, 

 humilis, alis attenuatis. Stomata magna, parum convexa, poro amplo, 

 cellulis 6 obconicis, 2-3 seriatis circumdata. Squamae poslicce purpureae 

 parvse, late semilunatse, appendiculo basi constricto, ovato, acuto, integer- 

 rimo. Carpocephala breviter pedunculata, pedunculo 3-4 mm. longo, 

 crasso, apice breviter patleaceo, capittila vertice profunde biIoba,Iobis sinu 

 amplo acuto divergentibus, apice mamillatis. Sporae 72 {x. Elateres 136 [a. 

 Androecia ignota. 



Hab. Texas (Wright). 



/3. Micropora. 



15. P. rupestre (Forster) St. 



Syn. Aitonia rupestris Forster, Comm. Soc. Gott. IX, p. 73. 

 Plagiochasma Aitonia Nees, Naturg. Eur. Leb. lY, p. 41. 



Dioica, mediocris, viridis, subtus purpurea, valida. Frons usque ad 

 2 cm. longa, 6 mm. lata, rarissime dichotoma, pro more ramulis posticis 

 e latere costee ortis innovata, antice plana, postice plano convexa, costa 

 lata haud prominente. Stomata parva, poro minimo, cellulis 5, parvis 

 obconicis circumdato. Gell. epidermidis valde incrassatse, trigonis magnis 

 ssepe trabeculatim confluentibus. Squamae posticse imbricatae, purpurete, 

 late semilunatse, abrupte appendiculatse, appendiculo anguste lanceolato, 

 acuto, integerrimo. Carpocephala subsessilia, longe barbata, paleis an- 

 guste lanceolatis apice longe flliformibus, normaliter quadriloba, vertice 

 lobis adscendentibus anguste foveolata. Sporae 72 ^i.. Elateres 200 ^, tris- 

 piri, spiris anguste tortis. Andrcecia in ramulis posticis rotunda vel 

 oblonga, ssepe 2 vel 3 dense consecutiva. 



Hab. Europa mediterranea, prsecipue Grxcia (Heldreich), Madeira 

 (Holl et Exped. Novara), Tenerifa (Krause), Abyssinia (Beccari, Penzig.), 

 Cap (Breutel). 



80 



