Answer: There are too many to list, but here are a few:
Eastern red cedar, white and red spruce, flowering quince, sea buckthorn, autumn olive, various junipers, beach plum, bayberry, privet, rosa rugosa, sweet autumn clematis, Virginia creeper, English ivy, heather, wormwood, asters, sea holly--these will all grow in exposed areas of shoreline.
For sheltered sites (away from direct salt spray) consider also euonymus, forsythia, rose of Sharon, Winterberry, beautybush, firethorn, spirea, and blueberries. There are, of course, numerous grasses that adapt well to seaside conditions.
I hope this helps!
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