PLANTS OF RHODE ISLAND. 37 



Order 72. THYMELEACE^. 



D I R C A , L. Le ATHERWOOI). 



palustris, L. Cumberland, Olney ; Burrillville, &c. 



Order 73. SANTALACE.^. 

 COMANDRA, Nutt. Bastard Toad Fi.ax. 

 umbellata, Xutt. 



Order 74. CERATOPHYLLACE^. 

 CERATOPHYLLUM, L. Hornwokt. 

 demersum, L., var. cominune. Stillwater, 



var. echinatum. Wenscott Reservoir. 



Order 75. PODOSTEMACE^. 

 PODOSTEMON, Miclix. River Weed. 

 ceratophyllus, Miclix. 



Order 76. EUPHORBIACE^. 

 EUPHORBIA, L. Spurge. 



1. polygonifolia, L. 



2. maculata, L. 



3. hypericifolia, L. 



4. Cyparissias.L. Cypress. 



5. P e p 1 u s , L. Newport, Congdon ; Matunuck, Bennett. 



ACALYPHA, L. Three-Seeded Mercury. 

 Virginica, L. 



var. gracilens. 



Order 77. URTICACE^. 

 ULMUS, L. Elm. 



1. fulva, Michx. Slippery Elm. East Providence. &c. 



2. Americana, L. 



CELTIS, Toiirn. Hackberry. 

 occidentalis, L., & vars. 



URTICA, Tourn. Nettle. 



1. gracilis. Ait. 



2. dioica, L. 



3. urens, L. 



