BULLETIN OF THE UNITED STATES FISH COMMISSION. 259 



ONAGEACE.E. 

 Evening Primrose Family. 



25 Jussicea decurrens, D. C. Virginia to Illinois and southward. 



26. Ludwigia palustris, Ell. Water Purslane. Common 5 also in Eu- 



rope. 



LYTHRACE^E. 



Loosestrife Family. 



27. Ammannia humilis, Michx. Tooth-cup. Massachusetts to Michi- 



gan, Illinois, and southward. Flats of Potomac, D. 0. 

 28 Ammannia latifolia, L. Ohio, Illinois, and southward. 



29. Nescea verticillata, H. B. K. Swamp Loosestrife. Flats of Poto- 



mac. 



UMBELLIFER.E. 



Parsley Family. 



30. Hydrocotyle repanda, Pers. Water Pennywort. Maryland and 



southward. 



31. Hydrocotyle ranunculoides, L. Shores of Potomac, Maryland. 



32. Hydrocotyle Americana, L. Common, northward. 



33. Hydrocotyle umbellata, L. Massachusetts, on the coast to Penn- 



sylvania. 



34. Hydrocotyle interrupta, Muhl. Massachusetts to Virginia and south- 



ward along the coast. 



35. Eryngium Virginianum, Lam. Eryngo. Button Snakeroot. New 



Jersey and southward. 



36. Discopleura capillacea, D. 0. Mock Bishop-weed. Massachusetts 



to Virginia, and southward. Near Custis Spring, Va. 



37. Cicuta bulbifera, L. Water- Hemlock. Common, northward. 



38. Sium cicutw folium, Gmel. Water-Parsnip. Common. 



39. Sium angustifolium, L. Massachusetts, Michigan, Illinois, west- 



ward. Europe. 



COMPOSITE. 

 Composite Family. 



40. Bidens cernua, L. Smaller Bur-Marigold. Virginia to Wisconsin 



and southward. 



41. Bidens chrysanthemoides, Michx. Larger Bur-Marigold. Common. 



42. *Bidens Beckii, Torr. Water Marigold. Massachusetts to New Jer- 



sey, Illinois, and northward. 



* Pronounced injurious to carp ponds by Dr. Hessel. 



