546 ANEURA. 
fere alatus, inter pinnas cuneato-dilatatus, ad axin sub 5 cellulas 
erassus. Pinnee opposite—superiores raro subalternee—alize seepe 
inordinatim elongate; pinnule pauce, lineares, repandz, parum 
celluloso-crenulate, apice obcordate, costa utrinque limbo eidem 
equilato vel angustiore marginata. Cellule laciniarum coste internze 
1-2-strate, cujusque strati sub 6-serlate, magne, elongato-hexagone, 
seepius acute, cellulis superficialibus duplo angustioribus, subequi- 
lateris vel paulo elongatis, in tenui strato obtecte; ce. limbi sensim 
minores equilaterze, ipsee marginales multo minores subquadrate 
convexule; omnes cellule leptodermes pellucide. 
Flores dioici: 9 receptacula linearia brevia vel elongata (1:°2™™), limbo 
incurvo utrinque subduplice, in bracteas ad costam usque fisso, cir- 
cumdata; bractez exteriores 3 vel 4, lato-cuneatze crenatee, interiores 
alternantes breviores subincise, supreme tamen (calyptram stipantes) 
ad basin usque plurifide. Calyptra clavato-cylindrica incurva papil- 
losa, apice alte mammillata. 
Amenta ¢ pinnulis inferioribus constantia ; alveoli ad 10-12-jugi; limbus 
incurvus crenato-lobulatus. 
5. ANEURA PECTINATA, Spruce. 
Hab. per totam sylvam Amazonicam a fluminis ostiis ad Andium Peruvie 
radices (alt. 1200™) usque; necnon secus fluvium Negro ad ejus 
origines usque: intra fines Venezuele praecipue frequens. 
Pinnule 10-15 x 4-5 ; cellule limlt 3 )—)5 ; calyptra 3:0 x °5 ; capsula 
ox oom, 
Pusilla, viridis vel rufescens, cxespitosa. Frondes 4-1 poll. longze ascen- 
dentes, imbricate, bipinnatipartitee. Caulis basi rhizomatosus ramos- 
que breves radicantes edens, ibidem compresso-teres (cellulis 8:8, 
vel 12:8 in diametris), superne dilatatus et plus minus alatus, ad 
pinnarum basin cellulis 15 in diametro transverso, 5 vel 6 cellulas 
crassus (interdum ad 22 x 11 cell. usque), supra pinnas primas paulo 
angustior sequitur. Pinne breves opposite conferte, flabellatim 
divisee—quasi bis terve dichotome, vel subpinnate ; pinnule laci- 
nizve sub 8, contiguee, lineares repande, costa tenui 4 cellulas, 
utraque ala 5 cellulas latis. Cellule alares majuscule vix elongate 
pellucide ; costales interiores superficialibus multo majores, caulis 
inferioris autem superficiales parum excedentes. 
Flores monoici: utriusque sexus pinnulas inferiores abbreviatas sistentes. 
Pistillidia floris 2 sub 8-juga, involucro digitatim plurifido utrinque 
limbata. Calyptra majuscula, superne parum tuberculosa, apice 
crasse mammillata, medio 6 cellulas crassa. Capsula 4plo brevior, 
cylindrico-oblonga, rufa, leptodermis ; cellule elongate, lineari- 
rectangulares, interiores spira plus minus incompleta farctee. Elateres 
helice simplice lata constantes, folliculo cito dissoluto. Sporee sub- 
globose leves elateribus eequilatie. 
Andrecia linearia, brevia ; alveoli sub 8-jugi monandri, involucro angusto 
incurvo crenulato. 
Caulis interdum ipsa basi prostrata tenuior, compressus, ramulosque 
compressos edens; ubi autem assurgit crassior est, subteres et lignosus.— 
Pseudoneura Bogotensis Gotts. in Hep. Novo-Gran., stirps ut videretur 
Jonge robustior, in Andibus alt. circa 2000™ viget ; nostra autem in ipsa 
planitie abundat montesque nullibi alte ascendit. 
