Aponogeton. hexandria trigynia. 209 



farrowed, otherwise smooth ; from one to three feet high. 

 Leaves alternate, all petioled, lanceolate ; the superior or 

 floral leaves linear, and very smooth ; all are entire, wav- 

 ed and smooth, from one to twelve inches lon*^., Petioles 

 with a trifling membranaceous vagina at the base ; verti- 

 cels numerous, approximate, consisting of numerous, 

 drooping, pedicelled flowers. Calyx ; leaflets linear, 

 small. Corol, valvelets ovate-lanceolate, callous grained 

 on the outside ; at the flowering time they are entire, and 

 as the seed advances to maturity become toothed on the 

 sides, by which time the grains are very large, oblong- 

 ovate, and with a granulous surface. Style short, fili- 

 form. Stigmas pencil-shaped. 



Observation. 



This diff'ers from R. aciitus of Europe in being annual, 

 and I think it may be a difierent species. I must however 

 leave it to those to point out wherein they difler, who have 

 an opportunity of doing so with the living plants before 

 them. Every part thereof possesses a considerable de- 

 gree of astringency and bitterness, without any thing like 

 acidity. 



2. R. vesicarius. Willd. 2. 256. 



Flowers hermaphrodite, geminate ; all the valves very 

 large, membranaceous, reflexed. Leaves undivided. 



Sans. Sh?/tavedhee. 



Beng. Chooka-palwng. 



Arab. Humarbostauee. 



Pers. Toorshumuk. 



Found cultivated in gardens all over Asia, and used by 

 the natives in their food, as well as medicinally. 



APONOGETON. Schreh. gen. n. 835. 

 Calyx, or corol two-leaved. Capsules three or four, 

 superior, each containing two, or more seeds. 



A a 



