PRACTICAL, CARP CULTURE. 89 



names given in that list where obsolete are placed in parenthesis, the 

 modern ones standing before them. The vernacular name of each is 

 added wherever it is known, and the localities of the American species 

 are given according to the best authorities. When found in the vicinity 

 of Washington the particular locality is mentioned. In the case of exotics 

 the general region of the globe is stated. 



RANUNCULACE^E CROWFOOT FAMILY. 



Ranunculus aquatilis, L. White Water-Crowfoot. The type is rare, 

 but the var. trichopyllus, Gray, is common in the United States. The var. 

 heterophyllus, DC. (JR. heterophyllun, Weber), is chiefly a European form. 

 Ranunculus multijidus, Pursh. (Ranunculus fluviatilis, Bigel) Yellow 

 Water-Crowfoot East New England to South Pennsylvania, Illinois and 

 Northwest. Caltha palustris, L. Marsh Marigold, Cowslips. Common 

 North and West. 



NYMPH.EACEJ5. WATER LILLY FAMILY. 



Cabomba caroliniana, Gray. Florida to North Carolina and west- 

 ward. Nymphwa odorata, Ait. Sweet-scented white Water Lilly. 

 Found at Great Falls and below Long Bridge. Common in the Northern 

 States, tfymphcea tuberoita, Paine. Tube-bearing Water Lilly. West- 

 ern New York to Michigan, Illinois, and probably in the Southern States. 

 Nuphar luteum, Smith. Smaller yellow Pond Lily. Chiefly European ; 

 the var. pumilum, Gray (JV. pumilum, Smith), is not rare northward m 

 the United States. 



HALORAQEJB WATER MILFOIL FAMILY. 



Myriophyllum. Water Milfoil. Six species are found in the Northern 

 United States, of which M. spicatum is the most common, and occurs 

 sparingly near Washington. Hippuris Vulgaris, L. Mare's Tail. New 

 York to Kentucky and northward; rare in the United States; more com- 

 mon in Europe. 



EVENING PRIMROSE FAMILY. 



Trapa natans, L. Europe, Siberia. 



UMBELLIFER^E PARSLEY FAMILY. 



Oenanthe sarmentosa, Presl. (Phellandrium aquaticum, L.) Oregon 

 and Washington Territory. 



% PRIMULACEJE PRIMROSE FAMILY. 



Hottonia injia.ta, Ell. (//. palustrus, Pursh.) Featherfoil. Massa- 

 chusetts to Louisiana. 



POLYOONACE.K BUCKWHEAT FA MILY 



Polygonum (amphibium, L. ?) Water Persicaria. Common. Has 

 been sparingly found near Georgetown, D. C. 



CERATOPHYLLACEJE HORNWORT FAMILY. 



Ccratophyl-fum rfc inn-sum, L. Horn wort. Abundant. 



