perennial salt marsh aster(n = noun.plant) - a variety of aster;
is a kind of aster

annual salt-marsh aster, aromatic aster, arrow leaved aster, aster, aster acuminatus, aster arenosus, aster cordifolius, aster divaricatus, aster dumosus, aster ericoides, aster falcatus, aster family, aster linarifolius, aster linosyris, aster macrophyllus, aster novae-angliae, aster novi-belgii, aster ptarmicoides, aster shortii, aster tripolium, aster turbinellis, azure aster, bay salt, beach aster, bile salt, bog aster, burweed marsh elder, bushy aster, calico aster, celery salt, china aster, common salt, cornflower aster, crooked-stemmed aster, dibasic salt, double salt, eastern silvery aster, epsom salt, flat-topped white aster, garlic salt, genus aster, glauber's salt, golden aster, goldilocks aster, grass-leaved golden aster, great salt desert, great salt lake, hairy golden aster, heart-leaved aster, heath aster, iodized salt, large-leaved aster, late purple aster, long-billed marsh wren, marsh, marsh andromeda, marsh bellflower, marsh buggy, marsh clematis, marsh cress, marsh elder, marsh felwort, marsh fern, marsh gas, marsh gentian, marsh hare, marsh harrier, marsh hawk, marsh hen, marsh horsetail, marsh mallow, marsh marigold, marsh milkweed, marsh orchid, marsh pea, marsh pink, marsh plant, marsh rosemary, marsh st-john's wort, marsh tea, marsh trefoil, marsh wren, maryland golden aster, microcosmic salt, mojave aster, monsel's salt, narrow-leaved white-topped aster, new england aster, new york aster, ngaio marsh, old salt, onion salt, panicled aster, perennial, perennial pea, perennial ragweed, perennial ryegrass, prairie aster, prairie golden aster, purple-stemmed aster, reginald marsh, rochelle salt, rock salt, rough-leaved aster, rush aster, salt, salt away, salt cod, salt depletion, salt flat, salt i, salt ii, salt lake city, salt lick, salt marsh, salt marsh mallow, salt merchant, salt mine, salt of the earth, salt plain, salt pork, salt reed grass, salt rheum, salt rush, salt shaker, salt tree, salt water, schreiber's aster, sea aster, sea salt, seasoned salt, short's aster, short-billed marsh wren, sickleweed golden aster, small white aster, smooth aster, sour salt, southern aster, starved aster, sticky aster, stiff aster, stokes' aster, table salt, take with a grain of salt, tansy leaf aster, tradescant's aster, upland white aster, wavy-leaved aster, western silvery aster, white prairie aster, white wood aster, white-topped aster, whorled aster, willow aster, wood aster