4o6 The Ohio Naturalist. [Vol. VI, No. 2, 



3. H. prolificum L. Champaign, Hocking, Defiance, Frank- 

 lin, Hamilton, Tuscarawas, Montgomery, Carroll, Holmes, 



.jij.ackson, Coshocton, Adams, Gallia, Harrison, Portage, Stark, 

 .Wyandot, Wayne, Scioto, and Fairfield Counties. Data are not 

 at hand concerning its ecological habits but it probably prefers 

 dry woods. 



4. H. sphaerocarpuni Michx. Lake, Franklin, Montgomery 

 and Clermont Counties. Should be found in dry woods in all 

 the western counties. 



5. H. vtrgatum Lam. A single specimen from Jackson 

 County. This species is more characteristic of the coastal plain 

 of the Atlantic from Delaware and New Jersey southward, but 

 has been reported from a number of places inland. It is easily 

 recognized by its leaf habit alone. 



6. H. perforatum L. Naturalized from Europe in fields and 

 along roadsides, Auglaize, Gallia, Ashtabula, Summit, Morrow, 

 Highland, Lorain, Clinton, Stark, Union, Carroll, Wayne, Tus- 

 carawas, Knox, Clark, Montgomery, Franklin, Richland, Noble, 

 Guernsey, Ross, Harrison, Madison, Butler, Jeft'erson and 

 Medina Counties. 



7. H. niaculatum Walt. Scioto, Muskingum, Franklin, 

 Adams, Wayne, and Logan Counties. 



8. H. subpetiolatmn Bickn. Most abundant in moist, 

 shaded woods. Stark, Highland, Lake, Richland, Erie, Shelby, 

 Crawford, Summit, Carroll, Union, Auglaize, Clinton, Cuyahoga, 

 Defiance, Hocking, Hamilton, Tuscarawas, Clermont, Gallia, 

 Lorain, Huron, Morgan and Licking Counties. 



9. H. mutilum L. In moist woods and along streams. 

 Huron, Stark, Morgan, Jackson, Wayne, Brown, Franklin, 

 Perry, Monroe, Scioto, Lake, Vinton, Clarke, Hamilton, Cuya- 

 hoga, Fairfield, Hocking, Clermont and Auglaize Counties. 



10. H. boreale (Britt.) Bickn. In peat bogs, Defiance and 

 Geauga Counties. 



11. H. gymnanthuni Engelm. and Gray. Erie County. 



12. H. Driimmondii (Grev. and Hook.) T. and G. In dry 

 soil and on rocks, Ashtabula and Hamilton Counties. Probably 

 introduced in the former. 



S.\ROTHRA L. 



A monotypic genus. 



1. 5. gentianoides L. In sand and on dry rocks, Erie, 

 Gallia and Scioto Counties. Probably occurs elsewhere along 

 the lake shore. 



Triadenum Raf. 



One species in the State. 



1. T. virginicum (L. ) Raf. In peat bogs and swamps in the 

 northern half of the State. Wayne, Erie, Geauga, Licking, 

 Cuyahoga and Huron Counties. 



