MARYLAND WEATHER SERVICE 133 



Typha angustifolia, which is not as abundant in the larger fresh 

 marshes as it is in those of the estuaries at the head of the Chesa- 

 peake. 



Outside pure stands the species above mentioned also occur spo- 

 radically in portions of the marshes in which a number of other 

 species of the same stature grow. While the flora of any square rod 

 of such areas of Fresh Marsh would be the same as that of any 

 other square rod, yet there are not only no two square rods but 

 scarcely any two square yards that would show the same species 

 present in anything like the same proportional abundance. The 

 life conditions are here such as favor a large number of species ; 

 the total flora is made up of herbaceous plants, — save for Hibiscvs 

 and Baccliaris, — and each growing season witnesses a new shifting 

 and a new readjustment of the elements of the vegetation. Most 

 prominent among (lie species of highest stature in the Fresh 

 Marshes are: 



Vernonia noveboracensis 



Asclepias pulclira 



Bidens trichosperma var. tenuildba 



Eryngium virginianum 



Eupatorium perfoliatam 



Acnida cannabina 



Helenium autumnale 



Impatiens biflora 



Carex lurida 



Panicum ivalteri 



Lobelia elongata 



Carex crinita 



Carex albolutescens 



Sagittaria latifolia 



Gyperus flavescens 



Juncus ejfusiis 



Pontederia cordata 



Sium cicutaefolium 



Kosteletzkya virginica 



Sagittaria lancifolia 



Solidago semper virens. 



