PotaMo-LEJEUNEA. 251 
(rarissime iterum prolifera) subtensi. Bracteze foliis minores, lobis 
planis subacutis, majore elliptico-lanceolato, minore diagonali ligulato- 
lanceolato equilongo brevioreve; bracteola ovata breviter bifida: 
omnes integerrime. 
Perianthia f. caulino subequilonga, subturbinato-oblonga urceolatave 
brevi-rostellata compressa, postice bicarinata, antice depressa carinu- 
lata, apice truncata, carinis celluloso-papulosis apice lato insigniter 
quadratis. 
Andreecia ramulis tenuibus julaceis 6-polyphyllis constantia. 
E colore lurido, perianthiis truncatis (non autem cornutis), ad Cerato- 
Lejeuneam certe accedit. Cerato-L. Coarine G. in Syn. Hep. 305, sub- 
ailinis, distinctissima tamen videtur. 
3. PotaMo-LEJEUNEA RIPARIA, Spruce. 
Hab. In fluvii Negro superioris ripis, ad truncos riparios inundatos. 
F-7x°5, *5x°35; lob 3x15; ¢ gy—gk; fit 35 x ‘35, ‘3x °3; br °65; bria 
“65 x °5; per “7 x °5™™, 
Rufo-lurida, prostrata, laxe stratificata; caules pollicares rectiusculi per- 
paulo ramosi, ramis pro more brevibus, 
Folia subplana parum imbricata, a basi fere ad medium usque complicata, 
plica recta angulum sub 80° cum caule formante, supra plicam sub- 
divergentia, subfalcata, oblique late oblonga rotundata repandula 
integerrima; lobulus } folii subequans subrectangularis vel semi- 
ovato-rhomboideus parum inflatus, sinu subexciso, apice acuto 
seepeque in dentem producto; cellule parvule subguttulatie limitibus 
latis trigonisque pellucidis, nucleo pellucido, granis chlorophyllicis 
subsparsis raro in annulum rufulum aggregatis: facie fere plane vel 
convexulze. 
Foliola subdissita, } folium equantia, suborbiculata, paulo ultra 4 acute 
bifida, lobis acutis seepe subacuminatis. 
Fl. dioici: Q in ramo breviusculo terminales, innovatione brevi simplice 
parvifolia suffulti. Bractez foliis vix equilonge, ad } bifida com- 
plicatze, lobo ovali obtuso, lobulo lanceolato acuto seepe lobum fere 
wequante; bracteola magna ovalis acuta, apice ad ;',-$ bifida, seg- 
mentis acutis plerumque tam contiguis ut bracteola integra videretur 
raro revera integra, superne angulata y. etiam paucidenticulata. 
Perianthia parum emersa obovata, apice rotundato brevi-rostellata, sat 
compressa, antice carinulata, postice bicarinata, carinis omnibus 
celluloso-subcrenulatis. d-Keeled 
Amenta ¢, in pl. propria, vel ramulum proprium vel rami apicem 
tenentia; bractese 4—5-jugee majuscule, cochleato-complicate, apice 
brevissime et fere zequaliter bifidee, subimbricatee. 
L. temnantha, huic omnium proxima, differt flor. monoicis ; lobulis foliis 
4-plo brevioribus; perianthiis apice tetragono-truncatis, &c. 
L. polystachya fl. monoicis, Q innovatione carentibus, ¢ amentis ad 
caulem creberrimis, perianthio levissimo, carinis apice rotundo- 
prominulis, &c., differt. 
Suscenus XXXII.—CHEILO-LEJEUNEA, §&. 
Plantze humiliores, raro pusilla, nunquam robusta, dense depresso-czespi- 
tose, recentes albidw, virescentes, flavide vel seepius rufuls, in sicco 
