ECHINODORUS. ALISMACEÆ (AUCT. M. MICHELI). 53 
(Wavra n. 465 in herb. Vindob.), ad Tinamene (Karsten in herb. 
Vindob.), Tehuantepec in prov. Oaxaca (Andrieux n. 91, typus AI. 
Andrieuxi Hook. in pluribus herbariis); in Nicaragua (Tate n. 399 in 
herb. Kew), in Brasilia, Rio S. Francisco (Martius), prope Aracatu 
(Gardner n. 1862 in herb. Kew); var. 2, ad Rio S. Francisco (Martius), 
prov. Minas Geraes (St-Hilaire). 
Obs. Specimen n. 351 a cl. Claussen in prov. Minas lectum, et a cl. 
Seubert sub nomine A. pubescens var. Clausseni descriptum, non hue 
pertinet ; foliis coriaceis, pellucide punctatis, scapo ramoso, staminibus 
numerosioribus potius ad E. grandiflorum referendum mihi videtur. 
5. E. subalatus (Griseb. Cat. pl. Cub. p. 218); foliis anguste 
ovatis vel lanceolatis, utrinque acutis; scapis erectis, subsimplicibus ; 
floribus breviter pedicellatis, post anthesin reflexis; bracteis basi coa- 
litis; staminibus 12; fruetu echinato, carpellis lateraliter uniglandu- 
losis. Alisma subalatum Mart. in Róm. et Schult. Syst. 7, p. 1609; 
Kunth Enum. 3, p. 153; Seub. in Mart. Fl. brasil. fasc. 8, p. 106. 
E. elliptico proximus, a quo lineis pellucidis foliorum, stylo longiore, 
et carpellorum costis paucioribus, tantum distinguitur; forte ejusdem 
mera varietas. Planta altitudine, longitudine foliorum, etc. variabilis ; 
inter varietates 3 in Flora brasiliensi enumeratas, formæ interme- 
diæ occurrunt. Petioli complanato-angulati, 10-40 cent. longi; limbi 
anguste ovati vel lanceolati, acuti, ssepe mucronulati, 15-20 cent. 
longi, 4-7 cent. lati, coriacei, sub 5 nervii, nervis secundariis approxi- 
matis, obliquis, lineæ pellucidæ regulares, elongatæ, obliquæ, ssepe 
difficile conspicuæ. Seapus (1 v. plures) erectus, simplex vel rarius 
basi ramosus, folia vix superans, triangulatus, angulis preecipue ad 
apicem inter verticillos subalatis. Verticilli 8-12, remoti; flores in quo- 
que verticillo 6-8, mediocres vel majusculi, pedicellis 5-7 mill. longis, 
post anthesin reflexis. Bracteæ basi coalitæ, e basi ovata longe acu- 
Minatæ, 10-15 mill. longæ, flores superantes. Sepala late ovata, mar- 
gine late seariosa, coriacea, concava, 5-7 mill. longa ; petala vix nota. 
Antheræ oblongæ, supra basim affixæ, filamentis paullo breviores. Car- 
pella numerosa, in fructum echinatum disposita, 7-9 costata, costis 
filiformibus, inter se æqualibus, lateraliter glandula unica, crassa, 
instrueta, stylo uncinato longe rostrata. 
In Guyana (Schomburgk n. 563), Guyana anglica, upper Jatrutze 
river (Appun n. 2164 in herb. Kew, specimen foliis latioribus, fere 
obtusis); in aquis stagnantibus Brasiliæ (Martius, Sellow, Raben), 
in prov. Saint-Paul (Lund in herb. Candoll.), in prov. Minas Geraes 
(Saint-Hilaire Cat. B! n. 1538 in herb. Mus. Paris.), ad Rio Moquem et 
