Hypericum 



Hypericaceae 



675 



Map 1413 

 Hypericum majus (Gray) Britt. 



When this perennial is compelled by weather conditions to grow with 

 the base of the plant submerged for the greater part of the season, the 

 submerged part becomes spongy. This form is known as Hypericum 

 adpressum var. spongiosum Robinson. It occurs with the species but in 

 wetter situations. 



Atlantic coast from Mass. to Ga. and up the Mississippi Valley from 

 La. to Ind. 



9. Hypericum denticulatum Walt. (Hypericum virgatum Lam.) Map 

 1411. In hard, white, minimacid clay soil in low, flat woods, associated 

 with pin and post oaks. The report by Clark from Marshall County should 

 be referred to some other species. Add Posey County to the map. 



N. J., Pa., and 111., southw. to Fla. and Tenn. 



10. Hypericum cistifolium Lam.* Map 1412. Alluvial and rocky, wooded 

 banks of streams and in sandy soil along roadsides and in prairies. Infre- 



* Svenson (Rhodora 42: 17-18. 1940) has shown that this name should be applied to 

 the Atlantic Coastal Plain plants while our plants should be called Hypericum 

 sphaerocarpum Michx. 



