128 PUBLIC HEALTH BULLETIN NO. 286 



12. L. simulata Small — Coastal Plain swamps, Florida to North 

 Carolina. 



13. L. alata Ell. — Coastal Plain, Florida north and west to and 

 beyond the limits of our territory. 



14. L. lanceolata Ell. — Coastal Plain aquatic areas, Florida to 

 North Carolina. 



15. L. limjolia Poir. — Acid pineland swamps, Coastal Plain, 

 Florida to North Carolina and Mississippi. 



16. L. linearis Walt. — Acid places, Coastal Plain, Florida north 

 and west to beyond the limits of our territory. 



2. Jussiaea L. 



1. Plants creeping or floating 2. 



1. Plants erect 3. 



2. Leaf-blades long-pet ioled; flowers 2-3 cm. 1. J. dij[jusa. 



across. 

 2. Leaf-blades short-petioled; flowers 3-4 cm. 2, ./. grandijlora. 



across. 



3. Capsule long, narrowly cylindric, more than 3 cm. long. 4. 

 3. Capsule shorter, obconic or nearly cylindric, less than 6. 

 2 cm. long. 



4. Calyx of 5 sepals 3. J. leptocarpa. 



4. Calyx of 4 sepals 5, 



5. Leaf-blades very narrow 4. J. angustifolia. 



5. Leaf-blades broad 5. J. scabra. 



6. Fruit winged; leaf-blades sessile and deciirrent 6. J. decurrens. 

 onto stem. 



6. Fruit not winged; leaf-blades short petioled 7. J. peruviana. 



1. J. dijfusa Forsk. — Florida westward, mostly in the Coastal 

 Plain, to beyond our limits. Not common in the eastern part of our 

 territory. 



2. J. grandiHora Alichx. — Ranges over all of our Coastal Plain, 

 and is established in some localities northward. Most often found in 

 aquatic areas associated with streams, and often grows well in im- 

 poundments. It and the preceding have been found in association 

 with Anopheles quadrimaculatus. 



3. J. leptocarpa Nutt.— Partial to acid places. Coastal Plain, 

 Florida to Georgia and westward to beyond the limits of our territory. 



4. J. angustifolia Lam. — Southernmost part of our territor}^, 

 Florida to beyond our western limit, in swamps. 



5. J. scabra Willd. — Wet places in Florida. 



G. J. decurrens (Walt.) DC. — Ranges over all of our area in low 

 grounds, most frequent in the Coastal Plain. Often found in weedy 

 habitats. 



7. J. peruviana L. — Everglades and in swamps, peninsular Florida. 



