784 bulletin de l'herbier boissier. Plagiochasma. 



16. P. nepalense (Ldbg et Bisch.) St. 



Syn. Anthrocephalns nepalensis L. et B. Nova Acta XVIII, p. 682. 

 Plag. Colsmannianum L. et G. Syn. Hep. p. 518. 



Dioica, mediocris, viridis, postice purpurascens. Frons usque ad 2 cm. 

 longa, 6 mm. lata, e latere costse innova ta, plana, costa crassa, ma gis 

 producta, alis attenuatis venoso-striatis, plicatulo-crispatis, adscenden- 

 tibus. Stomata parva, poro minuto, cellulis 5 obconicis circumdato; cellulse 

 epidermidis trigone incrassatse. Squamœ parvse imbricatse, purpurese, 

 apice sensim attenuatse, in appendiculum hyalinum angusle trigonum 

 subobtusum abeuntes, appendicula interdum geminata, basi nunquam 

 constricta. Carpocephala (ipse haud vidi) pedunculata, pedunculo longiore 

 barbato, paleis numerosis, rubris. lnvolucra solitaria vel 2 opposita, capi- 

 tuli discus emarginatus, bene evolulus, crassitudine ab involucris dis- 

 tinctus. Sporse? Elateresf Andrœcia furcata. 



Hab. Nepal (Wallich). 



17. P. chlorocarpum. Mont in Orbigny. Voy. Am. mér. Bot. p. 59. 

 Dioica, major, pallide viridis, postice purpurea. Frons usque ad 2 */* cm. 



longa, 8 mm. lata, costa angusla, alis latis adscendentibus, attenuatis, 

 plicatulo-crenulatis. Stomata parva, poro minimo, cellulis 4, obconicis 

 circumdato, parietibus radialibus valde incrassatis, stellatim attenuatis; 

 cellulae epidermidis trigone incrassatse. Squamœ posticse magna?, oblique 

 ovalse, purpurese, appendiculis duplo brevioribus, ligulatis, breviter acu- 

 minatis, acutis, interdum geminatis vel ternis. Carpocephala longe pedun- 

 culata, pedunculo usque ad 2 cm. longo, tenui, apice longe barbato, 

 vertice angusle breviterque emarginata, angulis mamillatim productis, 

 haud cornutis. Sporœ 68 jjl. Elateres 270 ^, trispiri ssßpe ramosi. Capsula 

 tenerrima. Andrœcia ignota. 

 Hab. Chile (Bertero. Gay). 



18. P. validum Bisch. Term. II, p. 56. 



Dioica, major, robusta. Frons usque ad 3 V 2 cm. longa, 6 mm. lata, 

 simplex vel furcata vel ex apice proliféra, plana, alis latis adscendentibus, 

 postice purpurascens, costa angusta, parum producta, longissime radi- 

 cellosa. Stomata parva, poro minimo, cellulis 4-5, obconicis circumdato, 

 parietibus radialibus valde incrassatis, stellatim attenuatis. Squamœ 

 imbricatse, late semilunatse, abrupte (interdum geminatim) appendiculatse, 

 appendiculis anguste ligulatis apice acutis. Carpocephala longius pedun- 

 culata, pedunculo basi maxime crasso et longitudinaliter rimoso, superne 



81 



