185 



te 



parva, inbricatula vel solum coutigiia, plus minus decurvo-se- 

 cunda^ semicordato-rotunda, margine antico rectiusculo late re- 

 curvo longe decurrente integerrima, postico praelate rotundalo 

 recurvo-cnstato apiceque rotundato distanter splnuloso-dentata, 

 dentibus 6-10 ; cellute parvulae, convexulae, ambitu late opaca-\ 

 ^^ incrassatione angular! nulla. — Folia 1.9"^"' longa (ab ipsa basi 



antica), 1.3 (a basi postica), 1.6 ^"' lata, cellulae ^V"^^- 



i 



fC 



^ 



< 



y - 





Hab. Bolivia, in 



bifc 



differt foliis angustioribus, ovato-oblongis, apice sa:pe bicuspi- 



datis. 



Pt.agiochila (§Frondescentes) Rusbyi, n. sp. 



Dioica, elata, rufo-brunnea ; caules e caudice repente a ma- 

 trice liberi (peuduli ?) tripollicares, ab ipsa basi eleganter pinnati, 



pmnls sub 12 cujusque lateris, brevibus (mediis ^ pollicis 



longis), frondem lineari-lanceolatam sistentes. Folia latiuscule 

 imbricata, patentia (ramea ad angulum acutum), utrinque basi 

 longe decurrentia, late semiovata, subtriangularia, apice obtusa 

 truncatave, margine antico recurvo sub apice 2-3 -dentata, 

 c^terum integerrima, postico (basi excepta) apiceque spinoso- 

 dentata, dentibus omnibus numero 10- 15, breviusculis, late 

 subulatis, ina:iqualibus ; cellulae parvulae, opacae. pachydermes, 

 mediae axialesque paulo longiores. Foliola nulla. Flores non 

 aderant. — Folia i.8X 1.25, cellulae tV 



Hab. In Andibus Bolivian orientalibus, loco Mapiri (alt. 5,000 

 ped. m. Aprili, 1886 (No. 3,031).- — P. thyoides. Hep, Am. And. 

 huic subsimilis, elatior est; foliis magis confertis, longioribus^ 

 solum apicem versus spinuloso-denticulatis; foliolis posticis 

 majusculis adjectis. — P, abietina, Nees, differt caule fibrilloso, 

 foliis tota fere longitudine argute spinoso-dentatis. 



Plagiochila (§ Froxdescentes) lignicola, n. sp. 



Dioica, virescens, elata, caule tripollicari et ultra, robusto, 

 pinnato et subbipinnato. Folia flaccida tenuia inibricata, distiche 

 patentia, semiovato-triangularia, obtusata vel truncata, utrinque 

 leniter recurva, basi baud longe decurrcntia, dein postice sub 

 abrupte dilatata et rotundata caulem transeuntia et vel appressa 

 vel cristatim recurva, margine supra medium — antico ssepe 

 solum versus apicem — denticulata, dentibus pro more parvis in- 

 asqualibus (numero circiter 12); cellulae parvulse pellucida?, trigonis 

 subnullis. Foliola nulla. — Folia 2.3 X 1.5, 2. OX 1.2, cellular ia'^^'K 



Hab. In situ Yungas Bolivia, alt. 6,000 ped. ad ramos 



emortuos. (No. 3,022). — P. dejiexirama, Tayl. distat caule dupio 



