Era 303 
licares, Calyx tetrasepalus; sepala ovato - lanceolata, acuta, integer- 
rima, glabra, extus virentia » tenuissime nervoso - striata, intus albida, 
patentia; petala 16 — 20, ovato -lanceolata, basi attenuata, apice longe 
et argute acuminata , integerrima, utrinque glabra, tenera, tenuiter 
nervoso -striata, alba, patentia, 15—18% longa, sepala aequantia 
vel fere superantia. Stamina indefinita, numerosa, pluriseriata; fila- 
menta omnia. petalis breviora, exteriora basi dilatata: delloidea vel 
ovata, petaloidea, interiora sensim angustiora, omnia apicem versus 
longe attenuata ; acuminata atque supra antheram in appendicem li- 
neam circiter longam producta, flavescentia; antherae locula linearia, 
basin versus divergentia, per totam longitudinem connectivo adnate, 
antice bivalvia, sulphurea. Ovarium semiglobosum, stigmate 12.— 15- 
radiato. € | 
Crescit in lacu mexicano, ibidem detecta a clar. de Har- 
winski. — Floret Augusto. 2. (v. .). 
B. filamenta non appendieulata. 
% 
50. JV. Amazonum, Mart. et Zuccar. 
4 | 
Rhizomate brevissimo subcylindrico erecto, foliis orbicularibus 
peltatis integerrimis cordatis lobis rotundatis ; petiolis infra folium 
annulo villoso instructis, calyce 4-sepalo petalis parum longiore, an- 
theris non appendiculatis, stigmate multiradiato. 3 
Rhizoma subeylindricum, erectum, vix pollicem longum atque 
crassitie digiti medii, radiculas plurimas fasciculatas albas succosas 
subsimplices vel hinc inde fibrillis minutis obsitas, crassitie varias 
emittens.. Folia in orbem disposita, natantia, petiolata, orbicu- 
laria, peltata, integerrima, cordata angulo acuto lobis rotundatis, 
superne ad lentem tenuissime papillosa » ceterum glabra et laete vi- 
ridia, subtus purpureo-violacea, venis a petiolo radiatim oriundis 
18 —20 marginem versus reticulatim inter se janet (indeque macu- 
