purple cress(n = noun.plant) cardamine douglasii - small perennial herb of cooler regions of North America with racemose purple flowers;
is a kind of bitter cress, bittercress

american cress, banded purple, belle isle cress, bitter cress, chamois cress, common garden cress, cress, cress green, cress plant, early purple orchid, early winter cress, garden cress, garden pepper cress, indian cress, land cress, late purple aster, marsh cress, meadow cress, mouse-ear cress, order of the purple heart, par'a0 cress, purple, purple amaranth, purple anise, purple apricot, purple avens, purple bacteria, purple beech, purple boneset, purple chinese houses, purple clematis, purple clover, purple emperor, purple finch, purple fringeless orchid, purple fringeless orchis, purple gallinule, purple grackle, purple granadillo, purple ground cherry, purple heart, purple heather, purple loco, purple locoweed, purple loosestrife, purple martin, purple milk vetch, purple mullein, purple nightshade, purple onion, purple orchis, purple osier, purple passage, purple pea, purple poppy mallow, purple rock brake, purple sage, purple sanicle, purple saxifrage, purple silkweed, purple strawberry guava, purple trillium, purple velvet plant, purple virgin's bower, purple willow, red-spotted purple, reddish purple, retinal purple, rock cress, rocket cress, royal purple, spring cress, stone cress, texas purple spike, tower cress, tyrian purple, visual purple, water cress, winter cress