436 THE PLANT LIFE OF MARYLAND 



Ranunculus acris L. Tall or Meadow Buttercup. 



Throughout the state; in cultivated grounds; common. Introduced from 

 Europe. 



Ranunculus bulbosus L. Bulbous Buttercup. 



Throughout the state; in cultivated grounds; common. Introduced from 

 Europe. 



Ranunculus pennsylvanicus L. f. 



Baltimore, Druid Hill Park (W. Ralph Jones). 



Ranunculus septentrionalis Poir. Swamp or Marsh Buttercup. 



Baltimore County, Gunpowder River (Robert K. Miller). 



Batrachium hederaceum (L.) S. P. Gray. Ivy-leaved Crowfoot. 



Prince George's County, Mt. Calvert (1556). 



Thalictrum dioicum L. Early Meadow-Rue. 



Throughout the state; in moist forests and open situations; common. 



Thalictrum polygamum Muhl. Tall Meadow-Rue. 



Anne Arundel County, Annapolis (M. A. Chrysler). 



Thalictrum purpurascens L. Purple Meadow-Rue. 



Coastal Zone. 



BERBERIDACEAE. 



Caulophyllum thalictroides (L.) Miehx. Blue Cohosh. 



Rare in the Midland Zone; common in the Mountain Zone; in moist 



forests. 

 Garrett County, Boiling Spring (19B4). 



Jeffersonia diphylla (L.) Pers. Twin-leaf. 



Rare in the Midland Zone; infrequent in the Mountain Zone; in moist 

 forests. 



Podophyllum peltatum L. May Apple. 



Throughout the state; in moist forests and open situations; common. 



MENISPERMACEAE. 



Menispermum canadense L. Canada Moonseed. 



Rare in the Coastal Zone; frequent in the Midland Zone; in moist forests. 



LAURACEAE. 



Sassafras sassafras (L.) Karst. Sassafras. 



Common in the Coastal and Midland Zones; rare in the Mountain Zone. 

 Talbot County, Easton (1371). 



Benzoin benzoin (L.) Coulter. Spice-bush. 



Throughout the state; in swamps, flood plains and moist forests; com- 

 mon. 



