/ 



MONOECIA TRIANDRIA. 



691 



. I 



scapo simplici; floribus 



dioicis; bracteis calyci- 



busque subrotundis, ob- 

 tusis. 



scape simple; flowers 

 dioecious; bracteas and 



calyx 

 obtuse. 



nearly 



round, 



Purshj 2. p. 213* Nutt. 2- p. 213. 

 S. Gracilis, Pursh, 2. p. 396. 



A plant in its general habit resembling the two preceding, but the leaves 

 are long, very narrow, with long, slender, divaricate lobes. In the var. 

 Gracilis, Pursh remarks that the leaf (from the summit of the petiole) rarely 

 exceeds 3 inches in length. 



Grows (at least the var. Gracilis) in the mountainous districts of Carolina 



and Georgia. 



Flowers July — August. 



Leaves floating, el 



4. Natans. Mich. 



5. foliis natantibus, 

 elliptico-lanceolatis, ob- 

 tusisv nervosis, infimis 



r ^^ ^^^ ^^ 



subcordatis,- scapo sim- 1 sJightly cordate 



plici, paucifloroj pedun 



liptic-lanceolate, , ob- 

 tuse, nerved, the lowest 



; scape 



few- flowered 



simple. 



culis inferioribns elon- lower peduncles very 



gatis 



long. 



Mich. 2. p. 190. Pursh, 2. p. 397^ ^ Nutt. 2. p. 213. 



Root perennial, the fibres articulated. Leaves generally floating, elliptit, 

 entire, 3-nerved, the lowest ovate cordate, 7-nerved, 1 — 2 inches long. 

 Scape generally erect, 3—6 inches long. Flowers not numerous, small, 

 the upper sterile. Leaves of the calyx lanceolate. Petah 

 about 8. Germs numerous. • 



Grows in shallow ponds. When deserted by water it becomes erect, but 

 rarely exceeds 6 — S inches in height. 



Flowers May — August. 



round 



t 



laii 



^' LvrSCIFOLlA. 



S. foliis lato-Ianceo 



Leaves broad. Ian 



9 



Sj 



glabris 



iitrmque acutis, | ceplate, acute at each 

 coriaceis, sub- ! end, glabrous, coriace- 



scapo I ons, somewhat perenni- 



perennantibus: 



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