ECHINODORUS . ALISMACEÆ (AUCT. M. MICHELI). 57 
autem metrales et ultra. Rhizoma lignosum, superne foliorum eftoe- 
torum vestigiis obductum,inferne fibras radicales validas agens. Petioli 
angulati, striati, limbum superantes, 4-10 cent. longi et ultra; limbi 
forma variabiles, sæpius late ovati, obtusi, basi cordati, lobis rotunda- 
tis, 6-8 cent. longi et lati; in speciminibus minoribus autem ovati vel 
etiam fere lanceolati, utrinque acuti, 2 cent. longi, 5 mill. lati (inter 
formas extremas, formæ intermediæ plurimæ occurrunt); omnes mem- 
branacei,3-7 nervii, nervis secundariis patentibus, parum remotis, rete 
venarum laxo; inter venas, lineæ pellucidæ obliquæ, ssepe elongatæ, 
preclare. Scapi 1-plures, erecti, folia valde superantes, angulati, 
superne paniculati ; in panicula, ramis fere semper tres in quoque ver- 
ticillo. Flores in quoque verticillo, 3 v. plures, pedicellis post anthesin 
erecto-patentibus, 12-14 mill. longis; bracteæ lineari-lanceolatæ, acu- 
minatæ, pedicellis breviores. Sepala ovata, obtusa, vix concava, 4-5 mill. 
longa, punctis albidis, scabriusculis ad venas notata : petala obovata, 
paullo longiora. Stamina sæpissime 12; filamenta complanato-filifor- 
mia, antheris oblongis, post anthesin contortis, duplo longiora. Car- 
pella in fructum echinatum capitata, 2 mill. longa, stylo ereeto longe 
aristata, 6-8 eostata, costis alternatim plus minusque prominentibus, 
prope styli basim, ad costam dorsalem, glandulis duobus instructa. 
Semina profunde punctata. 
In Americæ borealis civitatibus meridionalibus ubi formæ minores, 
et in Antillis uBi forme majores occurrunt: in Texas (Boll, Drum- 
mond, Berlandier n. 2422 in herb. Candoll. specimen minimum, 
Lindheimer n. 714, planta major, 80 cent. alta in herb. Kew, Trécul in 
herb. Mus. Par. ete.), Arkansas, Missouri prope St-Louis (Engelmann); 
in Jamaïca (Marsh, Bancroft in herb. Kew, Masson, Howston in herb. 
Brit. Mus.), in insula Guadalupæ (Duchassaing in herb. Berol.), in 
ins. Cuba (Otto n. 93 in herb. Berol., specimen foliis late ovatis, vix 
cordatis, Wright n. 3713), in ins. S. Domingo. 
l4. E. grandiflorus; foliis coriaceis, amplis, ovatis vel cordatis, 
punctis pellucidis lineisve brevibus, præclaris notatis; scapo erecto, 
paniculato, superne triangulato ; floribus amplis, luteis, 24-30 andris; 
Carpellis fere muticis, lateraliter glandulosis. Alisma grandiflorum 
Cham. et Schlecht. in Linn. 1827, p. 152; Rôm. et Schult. Syst. 
veget. 7, p. 1606; Kunth Enum. 3, p. 153; Seub. in Mart. Flor. bras. 
fasc. 8, p. 108. Al. floribundum Seub. ibid., p. 109. Ech. floribundus 
Seub. in Warm. Symb. fase. 13, p. 345. Sag. brasiliensis Mart. Syst. 
mat. med. bras. 
