POLYANDRIA PCLYGYNIA. . 61 



_, L 



Root perennial. Stem 1—10 feet long. Leaves alternate, somewhat 



crowded near tlie summit of the stem, elliptic, peltate, entire, floating oa 



tlie surface of the uater, glabrous and shining on the upper surface, the 



under surface purple, and togetlier with the petioles stem and peduncle 



cornpletely enveloped in a tenacious gelatinous fluid. Petioles 3—G 



inches long. Flowers solitary-, axillary. Peduncles S— 6 mdiQS, and 



with the whole plant except the upper surface of the leaves, purple. 



Leaves of the cahjx oval, nearly equal, the three interior membranaceous. 



btamens 20—30, a little shorter than the calyx. Germs 8—12, slightly 



.compressed, pubescent. Styles oblique. Stigfna A^cmr mi. Capsules 



a little ventncose, acute at each end, pubescent, l-celled. Seeds 1—2 in 



each capsule, attached by the point to the dorsal suture. 



For a very excellent description of the structure of the leaves of this 

 plant, consuk Nutall's Genera of North American Plants, a work abound- 

 ing in acurate information respecting the plants of this country. 



Grows very common in stagnant water 



Flowers May — August, 



CYAMUS. Salist. 



Calyx 4—5 phyl^ | Calyx 4—5 leaved 

 lus. Petala plarima. Petals numerouSc 

 Fructus turbinatus, i Fruit turbinate, hoi. 

 indiscotruncatofoveis lowed on its truncate 

 pinrimis monospermis disk into many one- 

 excavatus. Nuces o- seeded ceJls. Md o- 

 vatae, stylo persisteute vate,crowned with the 

 coronatce. I persistent style* 



1. LUTEUS, 



^ C. foliis peItatis,or- I Leaves peltate, or- 

 biculatis, integerrimis; bicular, entire ; coroL 

 corolla polypetala,- an. | la many petalled ; an- 

 theris superne hneari- | ther hnear near the 

 ""^* summit. 



Cyamus flavicomus. Pursh 2. p. 398. 



Nymphea Nelumbo. W^alt. p. 155. i 



Nelumbium Luteum Sp. pi. 2. p. 1259. Mich. 1. p. 317. 



Root perennial. Leaves larger than those of any other species of our 

 aquatic plants, peltate, orbicular, entire, generally floating, but sometimes 

 rising above the surfoce of the water. Petioles and Pednndes sDghtly 



