Table 9. (Concluded). 



Species 



Ecological zones 



II 



III 



IV 



Carya oovdiformis (bitternut hickory) U 



Carya glabra (pignut hickory) U 



Catalpa hignonioides (catalpa) U, L 



Queraus pagoda (cherrybark oak) C 



Asimina triloba (paw paw) C 



Pinus taeda (loblolly pine) C 



Queraus shumardii (Shumard's oak) U-R, L 



Quercus virginiana (live oak) U 



Serenoa repens (saw palmetto) U 



Lindera benzoin (spicebush) U 



Fagus grandifolia (beech) C, E 



Aristolochia serpentaria (Virginia snakeroot) (H) C 



Podophyllum peltatwn (mayapple) (H) U 



Chasmanthium laxa (river oats) (H) C 



X 

 X 

 X 

 X 

 X 

 X 

 X 

 X 

 X 

 X 

 X 

 X 

 X 

 X 



floodplain features (Chapter 1) and refer 

 to Figure 40, which illustrates the micro- 

 topography of nine selected floodplains. 

 Table 15 is cross-referenced to Figure 40, 

 thereby providing precise locations of 

 many dominance types. 



The best examples of each dominance 

 type have been documented by locality and 

 are listed in Tables 11-14. These domi- 

 nance types are intended to prepare the 

 reader for the incredible variety of bot- 

 tomland forest communities and associa- 

 tions which, as yet, have been little 

 studied. Occurrence is also indicated in 

 each table as common, ecologically or geo- 

 graphically localized, or rare. 



Where possible, reference is made to 

 Society of American Foresters' (SAF) 

 forest cover types (Eyre 1980); though 

 general and not always applicable in this 

 study area, this publication is useful. 

 Huffman and Forsythe (1981) classed a nur„- 

 ber of SAF types in their zonal descrip- 

 tions, including Zone VI, and related them 

 to soil moisture regimes for a broad 

 regional spectrum of floodplain types. 



Plant Communities in Zone I 



Submerged vascular aquatic plants are 

 confined to Zone I: rivers, guts, sloughs, 

 pools, and other permanently inundated 

 areas. The dominant aquatic plant in 

 the Santee River floodplain swamp was an 

 introduced species, alligator weed ( Alter- 

 nanthera philoxeroides ) (Dennis 1973). 

 Other species noted in this floodplain 

 which are characteristic of the region in 

 general are water weed ( Eqeria densa ), 

 hornwort ( Ceratophyl lum ), water milfoil 

 (My riophyllum ) , Brazilian elodea, duckweed 

 ( Lemna perpusilla ), Spirodela polyrrhiza , 

 water or mosquito fern ( Azol la carol ini - 

 ana ), Proserpinaca , and frog's-bit ( Limn3 

 bium 

 form 



'-oserpine 

 Jngia). 



spongia ). The submerged, thin-leafed 

 of spatterdock ( Nuphar luteum ) is 

 common in many spring-fed rivers. On 

 floodplains with tidal flushing, an inter- 

 tidal zone vegetated by quillwort ( Isoetes 

 f laccida ), eel grass ( Sagittaria kurzi- 

 ana ) , water milfoil, and Ludwigia may 

 occur (Figure 40, St. Marks River). 



42 



