788 bulletin de l'herbier boissier. Plcigiochcisma. 



27. P. lanigerum (Spruce) St. 

 Syn. Aitonia lanigera Spruce. Bot. Soc. Edimb. XV, p. 568. 

 Monoica vel dioica, minor, in latas piagas expansa, tenuis, pallide 

 viridis, margine et postice purpurascens. Frons usque ad 15 mm. longa, 



7 mm. lata subplana, aus attenuatis plicatulo-crispatis, crenulatis, costa 

 angusta. Stomata parva, poro minimo, cellulis 5 obconicis circumdato; 

 cellulse epidermidis trigone incrassatae; squamse posticee rosese oblique 

 ovatee, longe appendiculatee, appendicula basi haud constricta, squamse 

 œquilonga, lanceolata, acuta. Carpocephala pedunculata, pedunculo tenui, 



8 mm. longo, apice barbato, paleis filiformibus. Capitula biloba, vertice ad 

 1/3 exciso-bicornuta, cornubus recurvo-conniventibus. Sporse 68 \x, Ela- 

 teres 205 ^ bi-quadrispiri. Andrœcia bifurcata, fiori femineo approximata 

 vel in fronde propria. 



Hab. Andes quitenses (Spruce). 



c. Incertae sedis. 



«. Macropora. 



28. P. Schimperi St. n. sp. 



Dioica, magna, pallide- virens, tenuis. Frons usque ad 2 cm. longa, late 

 obcordata, 15 mm. lata, ex apice innova la vel dichotome ramosa, ramis 

 late obconicis, plana, costa lata, marginibus minus attenuatis. Stomata 

 magna parum convexa, poro cellulis 5-6 obconicis, 3-4 seriatis circum- 

 dato. Squamae magnas, sanguinese, late semilunatee, longe appendiculalse, 

 appendiculis anguste ligulatis, basi conslrictis, apice breviter acuminatis, 

 acutis. Andrœcia in disco magno, paleis brevibus lanceolatis purpureis 

 cincta. Reliqua desunt. 



Hab. Abtjssinia, in monte Semen (Schimper). 



Facile distinguenda fronde latissima. 



ß. Micropora. 



29. P. extensum St. nsp. 



Dioica, glauco-virens, subtus purpurea, valida, carnosa, in latas piagas 

 expansa. Frons 3-4 cm. longa, 5 mm. lata, simplex vel furcata, late 

 linearis, costa crassa bene producta, alis attenuatis, antice plana. Stomata 

 parva, poro minimo, cellulis 4-5 obconicis circumdato; cellulse epider- 



