MARYLAND WEATHER SEEVICE 143 



Area I. has a shelving beach devoid of vegetation and bounded 

 by a low bluff 1 to 2% feet high. Its central portion is occupied 

 by a sparse stand of Ammophila arenaria, with scattered individ- 

 uals of Cyperus grayi, Xanthium canadense, Cakile edentula, 

 Euphorbia polygonifolia, Strophostyles lielvola and Asparagus offi- 

 cinalis. There are a few clumps of Iva frutescens and two individ- 

 uals of the Red Cedar. The inner edge of the spit is also marked 

 by a low bluff outside which is a fringe of Spartina stricta var. mari- 

 tima. Surrounding the lake is a fringe of the same grass with a 

 few individuals of Baccliaris and Iva. Area III. is occupied by a 

 marsh of Spartina patens, Scirpus americanus, Solidago sempcr- 

 virens and Juncus canadensis. The inner edge of the marsh is also 

 fringed by a scattered row of Iva and Baccliaris. Area II. is devoid 

 of vegetation and is covered by high tide. 



Fig. 7 Diagram of the Plant growth on Castle Haven spit, Dorchester 



County. 



Lloyds Creek is an irregularly triangular estuary, tributary to 

 the Sassafras River. The spit extends from the western edge of 

 the Creek toward the east, parallel to the general course of the 

 shore line of the river. There is an island of old upland in the 

 centre of the spit which was doubtless connected with the mainland 

 by a tying-bar at a period much in advance of the formation of the 

 outer end of the spit. 



The outer beach of the spit is bounded by a low bluff, just within 

 which there is a ridge from which the surface slopes away at first 

 abruptly and then gradually to the water level on the inner side. 

 The vegetation of the beach consisted, when visited, solely of scat- 

 tered individuals of Polonisia graveolens, which is found in similar 

 habitats at the north (and is here south of its reported range) and 



