258 BULLETIN OF THE UNITED STATES FISH COMMISSION. 



9. * Nitphar ad/vena. Ait. Yellow Pond-Lily. Spatter Dock. Common 

 everywhere. 



10. *Naphar sagitttvfolium, Parsh. North Carolina and southward. 



CBUCIFEB^}. 

 Mustard Family. 



11. Cardamine rhomboidea, D. C. Spring-Cress. Common. 



12. Cardamine rotundifolia, Michx. Mountain Water-Cress. Penn- 



sylvania, and southward along the mountains. 



13. Cardamine hirsuta, L. Bitter Cress. Common. 



HYPEBICACE^J. 



St. John's-wort Famlly. 



14. Elodes Virginica, Nutt. Marsh St. John's-wort. Common. 



LEGUMINOS^. 

 Pulse Family. 



15. Lathyrus palustris, L. Marsh Vetchling. New England to Penn- 



sylvania, Illinois, and northward. 



CBASSULACE^}. 

 Orpine Family. 



16. Penthorum sedoides, L. Ditch Stone-crop. Common everywhere. 



HALOBAGEyE. 

 Water-Milfoil Family. 



17. Myriophyllum spicatum, L. Water-Milfoil. Below Alexandria, Va. 



18. Myriophyllum verticillatum, L. Common. 



19. Myriophyllum heterophyllum, Michx. Lakes and rivers, from North- 



ern New York, westward and southward. 



20. Myriophyllum scabratum, Michx. From Southern New England and 



Ohio, southward. 



21. Myriophyllum ambiguum, Nutt. Massachusetts to New Jersey, 



Pennsylvania and southward, near the coast. 



22. Myriophyllum tenellum, Bigelow. Northern New York, New Eng- 



land, and northward. 



23. Proserpinaca palustris, L. Mermaid-weed. Not rare. 



24. Proserpinaca pectinacea, Lam. Swamps near the coast. 



Pronounced injurious to carp ponda by Dr. Hessel. 



