130 PUBLIC HEALTH BULLETIN NO. 286 



CORNACEAE Dogwood family 

 1, Nyssa L. 



1. Fruits solitary, large (3-4 cm. long); stone winged or 2. 



sharply ridged. 

 1. Fruits 2 or more together, small (1-1.5 cm. long) ; stone 1. A^. sylvatica. 

 not winged or sharply ridged. 



2. Fruit purple or blue, stone only sharp-ridged; 2. A^. aquatica. 



large straight tree with swollen base, 

 2. Fruit red, stone winged ; small crooked tree 3. N. ogeche. 



1. N. sylvatica Marsh. Black-gum— Present in our region in no less 

 than four varieties but variety bijlora (Walt.) Sarg. is the most char- 

 acteristically aquatic. Ranges in the Coastal Plain (and occasionally 

 in upland provinces) over most of our territory and, in acid regions at 

 least, is very common. N. ursina Small is a copiously branched 

 shrubby species with a globular drupe which is known only from pine- 

 land swamps in the Apalachicola River delta in Florida. Our com- 

 mon aquatic Black-gum is listed as N. biflora Walt, by Small. 



2. N. aquatica L. Tupelo-gum^ — Ranges over all of our Coastal 

 Plain territory, being seen most often in alluvial situations. 



3. N. ogeche Marsh. Ogeche Lime — Acid situations from around 

 Apalachicola in Florida to extreme southern South Carolina. It has 

 a shrubby variety, var. acuminata (Small) Eyles, in pineland swamps 

 near the coast in Georgia. 



UMBELLIFERAE Carrot family 



1. Eryngium [Tourn.] L. 



E. aquaticum L. Snakeroot — Moist places along the coast from 



Florida north. 



2. Hydrocotyle [Tourn.] L. 



1. Leaves peltate 2. 



1. .Leaves not peltate 3. 



2. Fruit notched at the base and the apex 1. H. umhellata. 



2. Fruit not notched 2. H. verticillata. 



3. Leaves shallowly lobed; flower clusters almost without 3. H. americana. 



stalks. 

 3. Leaves deeply lobed; flower clusters with long stalks 4. H: ranunculoides. 



1. H. umhellata L. Water Penny wort —Coinmon aquatic species 

 and occurs over all of our area, especially in the Coastal Plain. 

 Found in a wide variety of conditions. 



2. H. verticillata Thunb. —Should also be found over all of our 

 area but not as commonly as the preceding. Most common in the 

 Coastal Plain. 



