25 Pteropsiella 



folia tristicha profunde bifida sistentes. Perianthmm prse- 

 longum lineari-subulatum trigono-prismaticum, ore 6- 

 laciniatum, leptoderme. Calyptra 4-plo brevior tenuis. 

 Capsula oblongo-cylindrica omnino Cephalozice. Andrcecia 

 amentiformia, postica, raro in ipso caule terminalia; bractese 

 et antheridia normalia. — Hab. et Distr. Stiips insignis in 

 subgenere solitaria, in sylvis fluminis Amazonum borealibus 

 coj)iose vigens. 



2. Cephalozia feondifoemis. 

 Pteroiisiella frondiformis Spruce in Journ. Bot. 1876. 



Frondes dioicce 1 — 2 pollicares prostratae olivaceo-virides, late line- 

 ares vel hie illic dilatat^, planse tenues validse costatee, apice attenuato 

 saepe decurvse et radicantes, subtus per intervalla radicellosse, et ramos 

 paucos posticos frondi similes, vel alios ilagellares radicellis pallidis 

 villosos, alios in florem cf vel , bracteis foliaceis stipatum, transfor- 

 matos, proferentes. Caulis (costave) semicylindricus, supra planus 2 

 vel 3 cell, latus ; cellulce corticales G-seriatae magnae brevi-cylindricae 

 subcompressae pellucid^, internae 2 — 3-plo angustiores sub 20-seriat8e 

 subopacae. Lamina frondis pro more utroque cost^ latere 4 — 6 cell. 

 lata — interdum hie illic ad 12 cell, lata — -laevis eroso-crenulata; cellulce 

 majusculse elongato-4 — 6 gonae, axi majore angulum 70° cum costa for- 

 mante, pellucidae fere vacuae leptodermes, in aetate subincrassatse, mar- 

 ginales longe minores. Flores $ ramulo perbrevi, facie costae postica 

 oriundo, sursum curvato, constantes. Bractecs 3-stich8e,3 — 4 jugse, in- 

 timae multo majores liberae pallidas pellucidae elongato-areolatae ovatas, 

 ultra medium bifidae, laciniis tenui-acuminatis denticulatis spinulo- 

 sisve ; bracteolae bracteis conformes, dimidio minores vel fere sequimagnae. 

 PenrtHi/iiabracteas triplo superantia, incurva, lineari-subulatatriquetro- 

 prismatica, ore constricto 6-fida, laciniis capillaceo-acuminatis subspi- 

 nulosis. Calyptra periantliio 4-plo brevior ovalis tenuis. Capsula-6h- 

 longo-cylindracea caeteraque omnino Cej)halozice. Andrmcii julacei oli- 

 vaceo-viridis hractece 10 — 20-jug8e confertae assurgenti-secundae rectan- 

 gulari-cuneatse breviter bifidae, segmentis saepe in cornua brevia por- 

 rectis, concavae, monandraa. Braci^oZi^ interdum adjectae sunt : parvffi 

 qua,dratae bidentatae, dentibus cellula 1 — 2 constantibus. 



