Lobelia elongata (longleaf lobelia)

Lobelia siphilitica (a similar species)

Carex sp. (sedge)

Carex lurida (a common wetland species)

Ilex coriacea (large gallberry)

Leaves and Fruit, Leaf

Lyonia lucida (fetterbush)

Leaves and Flowers, Leaves

Cassandra calyculata (leather-leaf)

Leaves

Peltandra sagittaefolia (white arrow arum) -- RARE

Leaf and Fruit, NC/SC/GA County Range Map
US Range Map and other info

Magnolia virginiana (sweetbay)

Leaf, Leaves and Fruit

Quercus nigra (water oak)

Leaf, Leaves and Acorns

Rhynchospora sp. (beakrush, beaksedge))

R. inexpansa (many look similar)

Taxodium distichum (baldcypress)

Leaves and cones (U. South Florida)
Other images

Clethra alnifolia (pepperbush, sweet pepperbush)

Leaves, Flower cluster

Salix sp. (willow)

S. caroliniana

Liquidambar styraciflua (sweetgum, redgum)

Leaves, Other images

Hydrocotyle sp. (pennywort)

H. bonariensis: Leaf, Flower cluster

Hypericum stans (St. Andrews cross) (Note: The PLANTS database shows H. hypericoides ssp. hypericoides as "St. Andrews cross"; I don't know if this is H. stans)

H. hypericoides ssp. hypericoides

Alnus serrulata (tag alder, hazel alder)

Leaves, Flower cluster

Mikania scandens (climbing hempweed, climbing hempvine)

Leaves, Flower cluster

Pluchea sp. (stinkweed, marsh fleabane, camphorweed)

Flower cluster

Baccharis halimifolia (groundsel-tree, silverling, sea-myrtle,
consumption-weed, false willow)

Leaves

Callicarpa americana (American beautyberry)

Leaves and Flowers, Fruit

Arundinaria gigantea (cane, switchcane, giant cane)

Stem, Leaves

Pontederia cordata (pickerelweed)

Leaves, Flowers