DS MONOCOTYLEDONE.E. ECHINODORUS. 
a, floribundus (A. floribundum Seub.); planta elata. Rhizoma re- 
pens, subcarnosum, fibris radicalibus longis, cortice laxo, spongioso 
involutis dense tectum. Petioli erecti, crassi, intus spongiosi, tuberculis 
minutis interdum scabri; limbi amplissimi, 25-30 cent. longi, 30-35 cent. 
lati, abbreviate ovati, basi sinu lato profunde cordati, lobis rotundatis, 
apice obtusi, superne glabri, subtus pilis stellatis præcipue ad nervos 
conspersi, nervis primariis 15-17 subtus prominentibus, secundariis 
patentibus, parum remotis, parallelibus, rete venarum denso, irregu- 
lari; puncti pellucidi parvi, præclari, sparsi. Scapus ssepius singu- 
lus, erectus, folia superans, ample paniculatus, superne angulatus et 
ibidem pilis stellatis plus minusve obductus. Verticilli remoti, nume- . 
rosi, multiflori. Pedicelli 15-20 mill. longi vel breviores, post anthesin 
leviter recurvi. Bracteæ exteriores 3, a basi liberæ, lanceolatæ, longe 
acuminatæ, pedicellos æquantes. Sepala ovata, obtusa, concava, 
anguste scariosa, multinervia, 7-8 mill. longa, post anthesin patentia; 
petala triplo quadruplove longiora, obovata, plus minusve saturate 
lutea. Stamina circa 30, verticillata, antherze oblongæ, basi sagittate, 
supra basim affixæ, filamentis paullo breviores. Ovaria stylo crasso, 
leviter inflexo rostrata. Carpella (nulla omnino matura, in herbariis 
reperiuntur) faleato-ovata, tri-costata vel rarius quinque costata, basi 
attenuata, loculo vix dimidiam partem carpelli oceupante, 2,5-3 mill. 
longa, glandulæ laterales 2-3 elongatæ. Semina punctata. 
B., ovatus; planta minor, in omnibus partibus glabra ; folia ovata, 
basi obtusa vel leviter cordata, apice sæpe breviter mucronata, 11-17 
cent. longa, 7-9 cent. lata, 9-11 nervia, punctis pellucidis lineisque 
brevibus intermixtis; panicula minus ampla, scapi humiliores; flores 
similes. 
y; pusillus; plante minimæ verisimiliter in sicco enatze, 10-20 cent. 
altæ; folia cum petiolo vix 4 cent. longa, 1 cent. lata; seapus erectus 
simplex, verticillos 2-3, quatri-quinque floros gerens: ceteris in flore 
fructu, ete. conformibus. 
Obs. Varietates a et 5 primo aspectu, valde remote videntur, sed 
formæ intermediæ plurimæ occurrunt, ut specimina in herb. Kew ser- 
vata præclare demonstrant. 
In paludibus Brasiliæ precipue centralis et australis; varietas a, 
prov. Ceara (Gardner n. 1860), Rio Janeiro (Glaziou n. 3664 in herb. 
Warming), prov. Minas Geraes, in paludibus ad Lorena (Lund n.155), 
ad Lagoa Santa (Warming, n. 157, specimen pubescens, ambo in herb. 
Warming, Claussen in herb. Kew); in insula Santæ-Catharinæ (Muel- 
ler in herb. Kew); in Uruguay (Gibert n. 495 in herb. Kew); varietas 
£ in Brasilia meridionali (Sellow); Buenos Ayres (Bácle n. 82 in herb. 
