A GUIDE AND KEY TO AQUATIC PLANTS 123 



2. H. semilobatus Cbapm. — Swamps, near the coast, East Florida. 



3. H. militaris Cav. Rose Mallow — Alluvial swamps over all of 

 our territory. 



4. H. moscheutos L. — Alarshes over all of our territory, especially 

 in alluvial areas. 



5. H. lasiocarpus Cav. — Swamps, various provinces, Georgia west 

 to beyond the limits of our territory. 



6. II. incanus Wendl. — Swamps, Coastal Plain, Florida and Ala- 

 bama north to beyond the limits of our territory. 



7. H. grandiflorus Alichx. — Marshes, Coastal Plain, Florida to 

 Georgia and Mississippi. 



HYPERICACEAE St. John's-wort family 



1. Hypericum L. 



1. Petals of flowers pink 2. 



I. Petals of flowers yellow 3. 



2. Filaments united only near the base; leaves 1. //. virginicum. 



sessile and clamping. 



2. Filaments united to near the middle; leaves 2. H. tuhulosum. 

 sessile and elusping or narrowed and petioled. 



3. Plants with prominent stolons 3. H. adpressum. 



3. Plants without prominent stolons 4. 



4. Inflorescence without leaves 4. H. cistifolium. 



4. Inflorescence leafy 5. 



5. Leaves clasping at base, ovate to ovate-lanceolate 5. H. myrtifolium. 



5. Leaves not clasping but narrowed at base. 6. 



6. Leaves conspicuously whorled; leaves very nar- 6. H. galioides. 



row, sometimes needle-like and not revolute. 



6. Leaves not conspicuously whorled ; leaves 7. H. densifiorum . 

 usually not needle-like and revolute. 



1. H. virginicum L. — Usually in acid swamps, ranging over most of 

 om* territory. 



2. H. tuhulosum Walt. — Consists, in our territory, of two varieties, 

 the typical one and variety walteri (Gmel.) Lott. Tlie former has 

 broad based leaves while in the latter the leaves are narrowed to 

 petioles. Both seem to, be well distributed over the Coastal Plain 

 in our territory. This and the preceding species are listed under the 

 genus Triadenum. by Small. 



3. //. adpressum Bart. — Various provinces, Georgia north and west 

 to beyond the limits of our territory. 



4. //. cistifolium Lam.— Sometimes found at the margins of acid 

 swamps and ponds. Coastal Plain, F'lcjrida north to South Carolina 

 and west to beyond the limits of our territory. This is given as 

 H. opacura T. & G. by Small. 



5. H. myrtifolium Lam. St. John's-wort — Acid ponds, Coastal 

 Plain, Florida north to South Carolina and west to Mississippi. 



