ECHINODORUS., ALISMACEJE (AUCT. M. MICHELI). 55 
late ovata, 2 mill. longa, stylo erecto breviter rostrata, lateraliter 
3 costata et 4 glandulosa, glandulis crassis distinctissimis. Species 
E. intermedio proxima, differt statura, staminum numero et statione 
geographica. 
Prope Mexico (Beechey in herb. Kew). Aliud specimen non cognosco. 
11. E. radicans (Engelm. in Gray Man. Bot. p. 499); foliis late 
ovatis, cordatis, lineis pellucidis brevibus notatis; scapo longissimo, 
prostrato; bracteis liberis ; floribus longissime pedicellatis, post anthe- 
sin reeurvis ; staminibus 20; carpellis glandulosis. Sagittaria radieans 
Nuttal Collect. tow. a flora of Arkansas, in Trans. Amer. philos. 
Soc. 1837, 5, p. 159. 
21 Rhizoma vix notum, videtur stoloniferum. Petioli angulati, intus 
lacunosi et transverse septati, striati, 20-30 cent. longi; limbi late 
ovati, obtusi, basi sinu lato vel angustiore cordati, 16-17 cent. longi, 
12-15 cent. lati, 7-9 nervii, nervis secundariis patentibus, paralle- 
libus, venis crebris, copiose et irregulariter anastomosantibus , lineis 
pellucidis, brevibus, præclaris. Scapus simplex, 1"-1",5 longus (fid. 
Engelm.), prostratus, ad verticillos radicans, striatus, subeylindricus. 
Vertieilli distantes, ubi radiculze adsunt unilaterales. Flores majusculi, 
in quoque verticillo 12-15, longe pedicellati, pedicellis post anthesin 
recurvis, 50 mill. longis. Bracteæ basi vix coalitze, lanceolatæ, sensim 
acuminate, 15 mill. longæ. Sepala late ovata, obtusa, multinervia;- 
nervis scabriusculis, 6-7 mill. longa, post anthesin patentia; petala 
obovata, sepala superantia. Stamina in verticillos plures disposita, 
antheræ supra basim affixæ, fere extrorsæ, elongatæ, filamentis com- 
planatis breviores. Carpella numerosissima, in fructum echinatum 
disposita, ovata, basi sensim attenuata, stylo brevi rostrata, costis 8-10 
inæqualibus, prominentibus, superne confluentibus, lateraliter bi- 
pluriglandulosa. Semina regulariter punctata. 
In paludibus civit. merid. Americ. borealis, Illinois (fid. Engelm. 
in Gray l. e.), Caroline (Bose in herb. Delessert et Candoll.), Fort 
Smith, Arkansas, Opelousia, Louisiane (in herb. Kew), Texas 
(Lindheimer), St-Louis ( Engelmann , ambo in herb. Berol.); iter 
mexicanum (Karvinsky sine numero in herb. Petrop.). Specimen dubium 
prope Vera Cruz (Galeotti in herb. hort. Brux.) 
12. E. humilis (Buch. in Pringsh. Jahrb. 7, p. 28); planta humi- 
lis, foliis lanceolatis, membranaceis; scapo foliis breviore unifloro, 
