24 Protoceplialozia. 



Subgenus l.—PROTO-CEPHALOZIA Spruce. 



Caulis nullus, nisi axiculus floris foeminei brevissimus, 

 ex ipso prothallio ortus. BractecE Q tristichae profunde bi- 

 lobse. Perianthia trigona, ore in lacinias 6 longas fissa. 

 AndrcEcia in prothallii ramis (nematoideis) terminalia 

 spicata. Habitatio et Distributio. Unica species hodie cog- 

 nita in America tropica inventa est. 



1. Cephalozia ephemeroides Spruce. 

 Minuta albicans acaulis, facie Ephemeri ceqidnoctialis Spruce. Pro- 

 tonema caBspitosum, filamentis confervoideis suberectis fastigiatis subdi- 

 cbotome ramosis constans. Cellula, filamentorum uniseriatse — raris- 

 sime basin versus biseriat^- — vix duplo longiores quam latse pellucidge 

 chlorophyllosse. E filamentorum fasciculi basi oritur. flosO; alia fila- 

 menta apice in amenta cf abeunt ; florescentia igitur monoica. Bractece 

 floris Q trijugse tristicliae confertse subereetse, intimse majusculse bifidae- 

 partitseve integerrimae, lamina basali ovata, laciniis subulatis apice fere 

 capillaribus ; bracteola bracteis sequilonga, magis profunde fissa ; celliilce 

 magnse tenues pellucidse lineari-hexagonae-parallelogrammseve . Bractese 

 exteriores sensim minores, conformes. Perianthia involucrum solum 

 dimidio superantia, pellucida, trigono-subulata incurva, ab ore profunde 

 (ad i — I longitudinis) sexfida, laciniis tenuibus flexuosis capillaceo- 

 acuminatis. Capsula parvula oblonga. Andracia bracteis fcemineis 

 plus duplo breviora tenuia recurva ; bractese sub lO-jugae minutae in- 

 curvo-secundae ovatae bifidse monandrae. — Filamenta .8 — 1.6"^™ lonrja, 

 eorimdem cellulce '^l^^—^l^^'^ longce, ^1^^^^ latce. Bractece $ 1.75, cellulcB 

 i/i2-i/8mm longcB. Perianthia 2.5 ; capsula .3 x .18 ™"i. 



Hab. in sylvis fluvii Negro superioris, locis S. Carlos et Catanacunami, 

 ad terram umbrosam. (E. S. 1854.) 



Subgenus 11.— PTEROPSIELLA Spruce. 



Planted sat robustae, pro filicula, Metzgeria vel Blyttia 

 quadam facile prgetervisse. Caulis validus, utrinque prgelate 

 alatus, revera frondiformis, serpentinus, ramosus et flagel- 

 liferus, cladocarpus, folia nulla parte nisi ad florescentias 

 ostendens. Bracteae floris ^ iis Proto-Cephalozice, conformes, 



