SAURURACE^E; CERATOPHYLLACEiE ; EUPHORBIACE/E. 



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Latin Names. 



Saurums, L., 

 S. ceruuus, L., 



CeratopJiyUum, 

 C. demersum, L., 



English Names. Geolog'l Station. Natural Habitat. 



Saururaceae. 



wizard's tail. 



. Horn wort. 



Limestone, . Ponds and bayous. 



Ceratophyllaceae. 



Ponds and bayous. 



Callitriche, L., 



C. verna, L., . 



*C. pedunculata, D C, 



C. autumnalis, L., . 



*C. peploides, Nutt., 



Callitrichacese. 



Water Starwort. 



Euphorbiacese 



Euphorhia, L., 



? E. polygonifolia, L., 



*E. heruiarioides, Nutt 



E. maculata, L., . 

 E. hypericifolia, L., 

 *B. cyathophora, Jacq., 

 E. corollata, L., 

 *E. obtusata, Pursh., 

 *E. graminifolia, Mich., 

 *E. arenaria, Nutt., 

 *E. heterantha, Nutt, 

 *E. peploides, Nutt., 

 *E. marginata, Nutt.? 

 Cnidoscolus, Polil., 

 *C. stimulosa, Gray, 

 Acalyplia, L., 

 A. Virginica, L., . 

 A. gracilens, Gray, 

 Tragia, Plum. 

 T. urticaefolia, Mich., 

 *T. angustifolia, Nutt., 

 *T. betonicoefolia, Nutt 

 Stillingia, Gard. 

 S. lanceolata, Nutt., 



Spurge. 



Spurge-Nettle. 

 Three-seeded Mercury. 



C. capitatum, Mich., 

 *C. glandulosum, L , 

 C. monanthogynum, Mich., 

 *C. muricatum, Nutt., . 



Limestone, 



Limestone, 



Spurge Family. 

 Sand, 



Limestone 



Sand 



Sand 

 Sand 



Limestone 

 Limestone 



Limestone 



Limestone 



Springs. 

 Nutt. Cat. 

 Mammoth Spring. 

 Banks of Mississippi. 



Banks. 



Banks of Mississippi R. 



Dry open places. 



Dry prairies. 



Nutt. Cat. 



Dry rocky prairies. 



Shady fertile woods. 



Nutt. Cat. 



Arkansas River. 

 It u 



Fort Smith. 

 Arkansas River. 



Banks. (Nutt. Cat.) 



Fields and prairies. 

 Barrens and rocky places. 



Rocky barren. 



Red River. Plains. 



u u 



Fort Smith, &c. 



Barrens. 



Open waste places. 



Barrens. 



Nutt. Cat. 



1 All the plants of this family have a milky, acrid, and caustic sap, which is sometimes poisonous, 

 taken internally. By external application, it is used as a caustic for destroying the warts of the skin. 

 Some exotic species are used in medicine. 



2 Perhaps both these species are only varieties of Tragia ureus, L. 



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