THE VEGETATION OF SHACKLEFOKD BANK ZD 



Lippia nodiflora ("Georgia to Florida"). 



Paspalum floridanum ("South Carolina to Florida, west to Texas"). 

 Rubus persistens ("South Carolina to Florida and Mississippi"). 

 Rynchospora stipitata ("In river swamps, Florida"). 

 Sabal glabra ("South Carolina to Florida and Louisiana"). 

 ♦Verbena polystachya ("Florida, through the Gulf States to California"). 



Spiranthes oralis has also not been reported from this State. Fcstuca 

 rubra ranges from Labrador to Virginia, mostly near the coast. 



Of the species listed which are not confined to the Austro-riparian 

 area, 27 are maritime and 28 usually occur along the coast. The north- 

 ern limits of these species are from ISTova Scotia to Maryland. With 

 few exceptions they range all along the shores of the South Atlantic and 

 Gulf States. 



Of the remaining species, the great majority are weeds of wide distri- 

 bution, and not confined to or characteristic of any one phytogeograph- 

 ical area. Of these, 137 range practically throughout the United States 

 except on the Pacific slope, while 21 occur throughout the Carolinian 

 and Austro-riparian areas. Leaving out of consideration these species 

 and the wide-ranging strand-forms, it is seen that the flora of Shackle- 

 ford is almost typically Austro-riparian in its character. The absence 

 of many forms usually occurring in this area^ is to be attributed, no 

 doubt, to the severe conditions for plant life on the sand banks, since 

 these species are abundant on the mainland, only one to two miles away. 



It is worthy of note that the species found also in more northern areas 

 which extend as far south as Beaufort, usually extend also throughout 

 the Austro-riparian area to Florida and the Gulf States. There are only 

 ten exceptions to this rule, or 3 per cent of the whole. In the list the 

 northern and southern limits are indicated in parentheses. 



Allium vineale (Connecticut to Georgia). 



Amaranthus pumilus (Rhode Island to South Carolina). 



Celtis occidentalis (Quebec to North Carolina). 



Chenopodium Botrys (Nova Scotia to Georgia). 



Digitaria tiliformis (Massachusetts to North Carolina). 



Festuca rubra (Labrador to Virginia). 



Panicum dichotomum (Connecticut to Georgia). 



Panicum spretum (New York to Georgia). 



Polypogon monspeliensis (New Hampshire to South Carolina). 



Vitis labrusca (New England to Georgia). 



iSee Kearney, 1. c, p. 314. 



