ARCHI-LEJEUNEA. 95 
Hab. In arborum radicibus ramisque inundatis, ad fluminis Amazonum 
tributarios boreales, fl. Negro et Casiquiari preecipue, frequens. 
Planta revera riparia, imo interdum subfluitans. In sylvis palustri- 
bus Guian Gallic invenit LEPRIEUR. 
7a 55 lob 152; cD: f@ 3x35; br 6; br 63 per 12x 7mm. 
Elata sordide viridis, lurida seepeque limo obruta, prostrata parum strati- 
ficata. Caules 2—4-pollicares, ramificatione crebra sed irregular, 
raro pinnata vel subbipinnata. 
Folia parum imbricata vel solum contigua, apice dissita, subplana, mar- 
gine supero incurva, falcato-oblonga rotundata (forma fere eorum 
Omalie trichomanoidis), recte complicata; lobulus 5-plo brevior—in- 
terdum minutus, linearis subplanus, basi supra caulem incurrens, sinu 
in lobum sensim abiens ; cellule parvulz subconformes leptodermes, 
chlorophyllo copioso in annulum congesto subopace, medio pel- 
lucidee. 
Foliola dissita, foliis 2-plo minora, oblato-orbiculata-obovatave. 
Flores monoici: 9 in ramo spe brevi terminales, innovatione simplice 
proliferave suffulti. Bracteze foliis minores, lobo anguste obovato 
rotundato, lobulo duplo breviore rhomboideo acuto, vel minore et 
oblique triangulari; bracteola obovato-oblonga rotundata integra. 
Perianthia foliis duplo fere longiora, turbinata pyriformiave, apice 
depresso rostellata, subcompressa, 5-carinata—rarissime postice 3-cari- 
nata, antice leviter 2-carinulata, carinis omnibus subalatis asperulis- 
que. Calyptra perianthium fere implens, ovalis, apice inzequaliter 
3-valvis, infra medium incrassata cellulis 2-3-stratis constans. Pedi- 
cellus obscure noduloso-constrictus haud geniculatus. Capsula 
globosa; elateres preelongi valvulas fere aquantes. 
Andrecia polyphylla, medium ramum spe tenentia; bracteze foliis con- 
secutive, paulo breviores, subinzequaliter complicate, concave, apice 
bilobe. 
Obs. Cum L. Leprieurii, Mont. descriptione 1. c. haud exacte convenit 
—quoad staturam nostratis majorem et folia falcata praecipne—eandem 
speciem tamen censeo.—Forsan etiam eadem est L. parviflora, Nees, a cl. 
Martio ad flumen Amazonum lecta, cui tamen adscripta sunt folia ovato- 
oblonga, lobulo minuto triangulari subnullove; ceeterum nostra minime 
“parviflora” est, quum perianthia longitudinem 11™™, attingunt. 
L. clypeata, Schwein. (Virginia, Sullivant M. Allegh. no. 262) nostrz 
aflinis, differt statura pusilla; colore albido-viridi; foliis minoribus semi- 
ovatis obscure subfalcatis; foliolis longioribus quam latis; bracteis g 
paucijugis. 
Specimina L. Lepriewrit pulcherrima, ramis foliisque Randie Ruizir 
ex parte adnata, ex parte libera et in aquis fluitantia, ad fluv. Casiqui- 
ari legi; alia in ipsa terra inundata vigebant. Itaque in schedis meis 
hance speciem primum appellavi Lejeuwnea potamophila, Mst. 
8, ARCHI-LEJEUNEA FLORENTISSIMA, Spruce. 
Hab. Ad fruticum ramos, in planitie Amazonica rarior (Caripi prope 
Parad); in Andium radicibus, precipue secus rivulos, magis frequens 
(Tarapoto, etc.); etiam ad fl. Ventanas prope Guayaquil, in Theo- 
bromate). 
