464 THE PLANT LIFE OF MARYLAND 



Cicuta bulbifera L. Bulb-bearing Water Hemlock. 



Midland Zone; frequent along the Potomac River in open wet situa- 

 tions. 

 Montgomery County, Great Falls (Robert K. Miller). 



Deringa canadensis (L.) Kuntze. Honewort. 



Throughout the state; in moist forests and flood plains; frequent. 

 Garrett County, S wanton (50S). 



Ptilimnium capillaceum (Michx.) Hollick. Mock Bishop-weed. 



Throughout the state; common in fresh marshes in the Coastal Zone, 

 frequent in open wet situations in all parts of the state. 



Aegopodium podagraria L. Goutweed. 



Baltimore County, Towson (Robert K. Miller). 



Hydrocotyle umbellata L. Marsh Pennywort. 



Throughout the state; in all moist situations; common. 



Hydrocotyle canbyi C. & R. 



Worcester County, Ocean City, in fresh marshes (Robert K. Miller). 



Hydrocotyle verticillata Thumb. Whorled Marsh Pennywort. 



Coastal Zone; in marshes and other wet situations; infrequent. 



Hydrocotyle americana L. American Marsh Pennywort. 



Rare in the Coastal Zone; common in the Midland and Mountain Zones; 



in moist forests. 

 Washington County, near Rohrersville (17S5). 



Hydrocotyle ranunculoides L. f. Floating Marsh Pennywort. 



Coastal Zone; in pools and streams; frequent. 

 Anne Arundel County, near Leon (1551). 



Centella asiatica (L.) Urban. 



Coastal Zone; in open moist sandy situations; rare. 

 Worcester County, Ocean City (1254a). 



Erigenia bulbosa (Michx.) Nutt. Harbinger of Spring. 



Montgomery County, near Great Falls (Frederick H. Blodgettj. 



CORNACEAE. 



Cornus canadensis L. Dwarf Cornel, Bunch-Berry. 



Mountain Zone; about the margins of bogs; infrequent. 

 Garrett County, Thayerville (2050). 



Cornus florida L. Dogwood. 



Coastal and Midland Zones, absent from the Mountain Zone; in moist 

 and dry upland forests, being one of the commonest small trees in all 

 forests. 



