HEXANDRIA. POLYGTNIi.. 241 



Order V — HEXAGYNIA. 

 S55. WENDLANDIA. IVilldenow, 



Calix 6-Ieaved. GoroWa of 6 succulent? petals. 

 Styles reclined. Germs 6. Berries eagh I -seed- 

 ed. Seed a compressed nut. 



A climbing- dioicous slirub; leaves alternate; racemes 

 superaxillary. Scarcely distinct from Menispermnm, with 

 wliich it ougiit ag-ain to be compared. 



Species. 1. W. caroUniana. {Menispermum corolinia' 

 niim of Walter and Michaux, Fl. Am. 2. p. 242.) 



Order VI.—POLYGYNIA. 



356. ALISMA. Z. (Water-plantain.) 



Calix 3-1 caved. Petals 3. Capsules many, 1- 

 seeded, not o[)ening. 



Aquatic plants with cordate, sag-ittate, ovate, or lance- 

 olate leaves; panicle simple or compound, branches and 

 branchlets ternalely verticiliated. (In A. iiatum, the leaves 

 are elliptic, the peduncles l-flowerect opposite the leaves, 

 and the fruit striated.) Nearly allied to, and scarcely dis- 

 tinct from Sagitinria. 



Species 1. \. Planiago. 2.nata7is, Fh. Both species 

 also indig-enous to Europe. There are of this genus also 

 3 other species in Europe, 2 in tropical America, and 1 ia 

 Guinea. Mr. Pursh's A. trivialis and A. f uvvifiora appear 

 to be only varieties of .£. Plantag'i. i-'or Jl. subxilata see 

 ^acdttcria. 



