103 



time of Knieskern to substantiate his record. Limnobium looks 

 very much like Heler anther a reniformis, which was not given 

 by Knieskern in his Catalogue. This last named plant has 

 been found in various parts of New Jersey, altho I have not 

 been able to find any station closer to Swimming River than 

 Milltown, Middlesex County, and Mr. Macy Carhart of Key- 

 port, who has devoted special attention to Monmouth County 

 writes that he has never found it. Under all of the circum- 

 stances it seems to me better in the absence of further data to 

 adopt a negative attitude concerning the record and to say that 

 we need more evidence before we can safely include Linmohium 

 as a New Jersey plant. 



The fact that Limnobium is an extremely rare and local plant 

 in the northern United States does not ever seem to have been 

 much emphasized. It is a species which finds its real home in 

 the low country in the southern part of the United States, and 

 from there it extends up the Mississippi Valley to southern Illi- 

 nois, and up along the Atlantic Coast to northern Delaware. In 

 addition it has been collected in western New York, and from 

 the standpoint of geographical distribution it may be regarded 

 as one of the most interesting plants found in New York. 



An old specimen from western New York still in excellent 

 condition is preserved in the Torrey herbarium at the New 

 York Botanical Garden and has on it the following data : "Found 

 on the shores of Lake Ontario in the town of Greece, Monroe 

 County, New York. It grows in stagnant waters, surrounded 

 with Azolla. Receiv^ed in a letter from Samuel Bradley, Post- 

 master of Greece, dated April 21st, 1828. I saw a few weeks ago 

 in the herbarium of Mr. Conrad of Philadelphia, a specimen 

 of this plant, said to have been found in Rochester, New 

 York." 



In addition to the above there is a specimen apparently of 

 the same collection in the Gray Herbarium received from the 

 Wm. Boott herbarium and a specimen at the Philadelphia 

 Academy of Natural Sciences marked as from "Genesee, N. Y.'' 

 I am informed by Mr. M. S. Baxter of Rochester, that the plant 

 has not been found in recent years in western New York. Dr. 

 Homer House the State Botanist knows nothing of it beyond the 

 Bradley record and Paine 's citation (Cat. PI. Oneida Co. 134) 

 of Sartwell also as having collected it. 



