54 MONOCOTYLEDONE.E. ECHINODORUS. 
Rio Preto (Burchell n. 7855 et n. 7781), Montevideo (Courbon n. 1856 
in herb. Mus. Paris. foliis submersis, fluitantibus, tenuiter membra- 
naceis ?) 
9. E. intermedius (Gris. Cat. Cub. p. 218); foliis membranaceis, 
lineis pellucidis elongatis; scapo erecto, simplici; verticillis paucifloris, 
remotis; bracteis anguste ovatis, longe acuminatis, liberis; floribus 
parvis, reflexis; staminibus 9; carpellis stylo breviter rostratis, pluri- 
elandulosis. Exclus. Al. intermedium Mart. ut syn. 
Plantæ plerumque parvæ, rarius editiores (10-40 cent.). Petioli basi 
breviter vaginantes, 5-6 cent. longi; limbi 2,5-6 cent. longi, 1,5-3 
cent. lati, ovati, utrinque acuti vel apice obtusi, 3-5 nervii, nervis 
secundariis patentibus, venarum rete laxo; folia exteriora sspe sub- 
mersa et ad phyllodium reducta. Scapus gracilis, folia valde superans, 
superne triangulatus; verticilli 4-7 distantes; flores parvi, pedicellis 
eracilibus, bracteas subæquantibus, post anthesin arcte reflexis: 
bracteæ anguste ovatæ, in acumen longum sensim desinentes, 10 mill. 
longs. Sepala late ovata, obtusa, concava, margine scariosa, post 
anthesin patentia, 3 mill. longa; petala albida, late ovata, sepala 
paullo superantia. Stamina 9 biseriata, 6 sepalis et 3 petalis opposita: 
filamenta subulata, antheras late ovatas superantia. Carpella late 
ovata, stylo brevi, uncinato, rostrata, costæ 6-8 filiformes, glandulæ 
laterales plures, irregulares. Ab. Ech. subalato, differt staminibus 
paucioribus, carpellorum forma et glandulis. 
In locis humidis, in Antillis et regionibus calidioribus Brasilie: 
Cayenne (Rotheray n. 65 in herb. Kew), Cuba (Wright n. 3198), in 
vicinibus Santarem prov. Para (Spruce), ad flumen Tapajoz (Spruce). 
10. E. virgatus; foliis late ovatis, cordatis; scapo ramoso; flo- 
ribus breviter pedicellatis, reflexis; carpellis lateraliter pluriglandu- 
losis. Alisma virgatum Hook. et Arn. Bot. of Capt. Beeehey's Voy.183%. 
p. 511 
Rhizoma et radices ignotze; folia ampla, 20 cent. longa, 15 cent. lata, 
membranacea, sinu lato eordata, 9- 11 nervia, nervis secundariis irre- 
gulariter parallelibus, rete venarum denso, irregulari, lineis pellucidis 
elongatis, obliquis. Scapus erectus, superne triqueter, angulis subalatis. 
verticillis remotis; flores mediocres, pedicellis 10 mill. longis, post 
anthesin reflexis; bracteæ ovatæ, acuminatæ, pedicellos subæquantes. 
Stamina 12, circa 3 mill. longa, filamenta filiformia, antheras late ova- 
tas superantia. Carpella numerosa, in fructum echinatum disposita. 
IR CB CLERC EET uo EEE MERGE ERIT DIS EEE 
