PLANTS OF IOWA 192 



Hibiscus, L. 



2495. H. militaria, Cav. Halberd-leaved Rose-mallow. 

 Frequent in wet ground. 



2496. II. trionum, L. Bladder Ketmia. 

 In waste places; from Europe. 



HYPERICACE^E. ST. JOHN'S-WORT FAMILY. 



Hypericum, L. 



2497. II. ascyron, L. Great St. John's-wort. 

 Common in rather quiet, open places. 



2498. H. prolificum, L. Shrubby St. John's-wort. 

 On rocky soil; infrequent. 



2499. II. splicerocarpum, Miehx. Round-fruited St. John's- 



wort. 

 Common on dry slopes. 



2500. II. perforatum, L. Common St. John's-wort. 

 Introduced ; infrequent. 



2501. II. maculatum, Walt. Spotted St. John's-wort. 

 Common, in rather moist soil. 



2502. H. mutilum, L. Dwarf St. John's-wort. 

 In low ground ; frequent. 



2503. IT gymnanthum, Engelm. & Grayl. Clasping-leaved 



St. John's-wort. 

 Frequent in low ground. 



2504. H. canadense, L. Canadian St. John's-wort. 

 On moist, sandy banks, etc. Not abundant. 



2505. H. droynmondii, (Grev. & Hook.) T. & G. Drommond's 



St. John's-wort. 

 In dry soil, not common. 

 Sarothra, L. 



2506. 8. gentianoides, L. Orange-grass. 

 In sandy soil. 



Triadenum, Raf. 



2507. T. virginicum, (L.) Raf. Marsh St. John's-wort. 

 In wet soil. 



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