MARYLAND WEATHER SERVICE 165 



Adicea pumila 

 Polygonum Virginian uni 

 Thalictrum polygamy ni 

 Impatiens biflora 

 Ehexia mariana 

 Hypericum maculatum 

 Sanicula marylandica 

 Cicuta maculata 

 Deringa canadensis 

 Steironema ciliatum 

 Phlox paniculata 

 Sabbatia angularis 

 Lycopus virginicus 

 Teucrium canadense 

 Verbena hastata, 

 Asclepias incarnata 

 Cuscuta gronovii 

 Mimulus ringcns 

 Lobelia cardinalis 

 Heliopsis helianthoides 

 Budbeckia laciniata 

 Eupatorium perfoUalum 

 Eupatorium purpureum 

 Lactuca villosa. 



~No doubt this list would have been more satisfactory if collec- 

 tions could have been made earlier in the season, for the vernal 

 plants of flood plains are very characteristic. 



Cypress siuamps. — The northern limit of The Bald Cypress 

 (Taxodium distichum) is stated by Sargent to he southern Dela- 

 ware, so that Southern Maryland is just within the range of this 

 species. Only two examples of these swamps are known to the 

 writer, one in Wicomico County on the Eastern Shore, and the 

 other in Calvert County in the valley of Battle Creek. Only the 

 outskirts of the latter swamp were visited, but Curran (I.e.) re- 

 cords the occurrence of trees having a diameter of 60 inches, though 



