390 



TYPHACEJE; LEMNACEJE ; PALMiE ; HYDROCHARIDACE^. 



Latin Names. English Names. Geolog'l Station. Natural Habitat. 



Typhaceae. Cat-tail Family. 



Typha, Tour., . . Cat-tail flag. 



T. latifolia, L., " Ponds and bayous. 



Sparganium, Tour., . Bur-reed. 



S. simplex, Huds., Limestone springs, Mammoth Spring. 



LemnaceaB. Duckweed Family. 

 Lemna, L., . . . Duck meat. 



L. trisulca, L., . . " . Floating, . . Mammoth Spring. 



L. minor, L., . . . " . " " « 



*L. polyrrhiza, L., 1 « . " Nutt. Cat. 



Palmae. Palms. 



Sabal, Adans., 2 . . Palmetto. [Arkansas River. 



S. Adansoni, Guer., . "... Alluvial, . . Deep marshes mouth of 



Naiadacese. Pondweed Family, 

 ZannicJiellia, Mich., . Horned Pondweed. 



Z. palustris, L., u Mammoth Spring. 



Potamogeton, Tour., . Pondweed. 



P. compressus, L., " " 



P. pralongus, WuMf., " " 



P. natans, L., " u 



*P. heterophyllus, ScTir, Nutt. Cat. 



Alismace89. Water Plantain Family. 



Alisma, L , . . -. "Water plantain. 



A. Plantago, L., . . " " Ditches. Ponds. 



Fchinodorus. 



*E. rostratus, Engl., Ponds of Verdigris River. 



Sagittaria, L., . . Arrowhead. 



*S. radicans, Nutt, Shallow water. Ft. Smith. 



*S. variabilis, Engel., u and wet places. 



*S. simplex, Pursh., " " 



Hydrocharidaceae. Frog's-Ut Family. 

 Limnobium, Rich.,. . Frog's bit. 



L. Spongia, Rich., Ponds. 



Anacharis, Rich., . . Water weed. 



A. Canadensis, PI., . " ' Mammoth Spring. 



Valisneria, Mich., . . Eel-grass. 



*V. spiralis, L., Slow rivers. (Nutt. Cat.) 



1 Lemna perpusilla, Torr., is also probably a species of Mammoth Spring. I could not find it in fruit. 



2 M. Nuttall says that this Palm first makes its appearance a few miles below the Southern boundaries 

 of the Arkansas Territory, on the banks of the Mississippi River. It is now found in abundance at the 

 mouth of Arkansas River, back of the town of Napoleon. Has this species changed its distribution 

 ascending northward, or has it escaped the attention of M. Nuttall, one of the most careful, exact, and 

 attentive explorers ? 



