MARYLAND WEATHER SERVICE S3 



fresh situations, and Eryngium virginianum, Ptilimnium capilla- 

 ceum, Hibiscus mosheutos and others extend up the tidal streams far 

 beyond the influence of brackish water, yet they are not found, in 

 Maryland, off the larger tidal streams the vegetation of which merges 

 below into purely halophytic marsh. Solidago sempervirens is found 

 in all situations from the most saline marshes to those far upstream 

 bej'ond the influence of brackish water, and as well on the Strand. 

 Baccharis halnnifolia. which is usually found only' along the line 

 separating streams and marshes from the upland, is not infrequent 

 in the Eastern Shore counties growing in pine woods at as much as 

 two to four miles distance from the nearest, shore-line, which accord- 

 ing to Kearney, is also the case in the Dismal Swamp region. 



These statements go to show that the class halophytes is not a 

 strictly coherent one, and that it is difficult to draw a just line 

 between the physiologically true halophytes and a large number of 

 slightly salt-resisting plants which are associated with certain of the 

 halophytes iu the brackish and fresh marshes of our tidal rivers. 

 In the following list of the halophytes of the Maryland flora the 

 range of each is given in order to show the wide distribution of the 

 majority 7 of them. 



Potamogeton crispus 



Massachusetts to Virginia. 

 Europe. 



Potamogeton pectinatus 



Cape Breton Island to Florida and Texas. 



British Columbia to California. 



Europe. 



Ruppia marilima 



Nova Scotia to Florida and Texas, 



Pacific Coast and saline situations in the interior. 



South America, 



Europe. 



Zostera marina 



Greenland to Florida. 

 Pacific Coast, 

 Europe, 

 Asia. 



