456 THE PLANT LIFE OF MARYLAND 



Hibiscus militaris Cav. Halberd-leaved Rose-Mallow. 



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



Hibiscus trionum L. Bladder Ketmia. 



Wicomico County, Salisbury (W. Ralph Jones). Introduced. 



HYPERICACEAE. 



Ascyrum stans Michx. St. Peter's-wort. 



Coastal Zone; in dry forests, being most abundant on sandy soil. 

 Worcester County, Berlin (660). 



Ascyrum hypericoides L. St. Andrew's Cross. 



Common in the Coastal Zone in dry forests and open situations, rare in 



the Midland Zone in dry sandy soil. 

 Worcester County, Berlin (661). 



Hypericum prolificum L. Shrubby St. John's-wort. 



Midland Zone; in moist open situations; infrequent. 

 Washington County, Hancock (730). 



Hypericum densiflorum Pursh. Bushy St. John's-wort. 



Throughout the state; infrequent in bogs and open wet situations in the 



Coastal Zone and Midland Zone; common in the Mountain Zone. 

 Queen Anne's County, Sudlerville (1670). 



Hypericum perforatum L. St. John's-wort. 



Throughout the state; in fields and waste situations; common. Intro- 

 duced from Europe. 



Hypericum maculatum Walt. Spotted St. John's-wort. 



Throughout the state; in moist open situations; frequent. 

 Cecil County, Leslie (421). 



Hypericum mutilum L. Dwarf St. John's-wort. 



Throughout the state; in fresh marshes, swamps, moist forests and open 

 wet situations; common. 



Hypericum canadense L. Canadian St. John's-wort. 



Throughout the state; in fresh marshes, swamps and open wet situations; 



common. 

 Wicomico County, near Vienna (1327). 



Sarothra gentianoides L. Pine Weed, Orange Grass. 



Throughout the state, being common on the lighter soils of the Coastal 



Zone, and frequent in dry open situations in the Midland and Mountain 



Zones. 

 Allegany County, Cumberland (922). 



Triadenum virginicum (L.) Raf. Marsh St. John's-wort. 



Common in the Coastal Zone; infrequent in the Midland Zone in fresh 

 marshes, swamps and open wet situations. 



