This is a list of flora that are native to the U.S. state of Washington.
Plants sorted by family
Adoxaceae
- Sambucus nigra ― blue elderberry
- Sambucus racemosa ― red elderberry
- Viburnum edule ― high-bush cranberry
- Viburnum ellipticum ― common viburnum
- Viburnum opulus ― snowball viburnum
Asparagaceae
- Asparagus officinalis ― garden asparagus
- Brodiaea coronaria ― bluedick brodiea
- Camassia quamash ― common camas
- Camassia leichtlinii ― large camas
- Dichelostemma congestum ― ookow, northern saitas
- Maianthemum dilatatum ― false lily-of-the-valley
- Maianthemum racemosum ― feathery false lily-of-the-valley
- Maianthemum stellatum ― starry false lily-of-the-valley
- Muscari armeniacum ― garden grape-hyacinth
- Ornithogalum umbellatum ― sleepydick
- Triteleia grandiflora ― blue umber lily
- Triteleia hyacinthina ― white triteleia
Athyriaceae
- Athyrium filix-femina — common lady fern
Berberidaceae
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Betulaceae
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Blechnaceae
- Blechnum spicant — deer fern
Boraginaceae
- Hydrophyllum tenuipes — Pacific waterleaf
Caprifoliaceae
- Symphoricarpos albus — snowberry, waxberry
Cannabaceae
- Celtis reticulata — western hackberry/netleaf hackberry
Cornaceae
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Cupressaceae
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Cyperaceae
- Schoenoplectus acutus — tule
Dryopteridaceae
- Polystichum munitum — western sword fern
Ericaceae
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Fagaceae
- Chrysolepis chrysophylla — golden chinquapin
- Quercus garryana — Oregon white oak
Hydrangeaceae
- Philadelphus lewisii — Lewis's mock-orange
Liliaceae
- Clintonia uniflora ― bead lily, queen's cup
- Erythronium grandiflorum ― yellow glacier lily
- Erythronium oregonum ― white fawn lily
- Erythronium revolutum — pink fawn lily
Oleaceae
- Fraxinus latifolia — Oregon ash
Orchidaceae
- Goodyera oblongifolia — rattlesnake plantain
- Cephalanthera austiniae — phantom orchid
Paeoniaceae
- Paeonia brownii — native peony
Papaveraceae
- Dicentra formosa — Pacific bleeding heart
Pinaceae
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Plantaginaceae
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Polypodiaceae
- Polypodium glycyrrhiza — licorice fern
Ranunculaceae
- Actaea rubra ― baneberry
- Anemone deltoidea ― three-leaved anemone, Pacific white anemone, Columbian windflower
- Anemone multifida ― cut-leaf anemone
- Aquilegia formosa ― red columbine
- Caltha biflora ― two-flowered marsh marigold
- Caltha leptosepala ― white marsh marigold
- Coptis asplenifolia ― fern-leaved goldthread
- Delphinium menziesii ― Menzie's larkspur
- Pulsatilla occidentalis, syn. Anemone occidentalis ― western anemone, white pasqueflower
- Ranunculus eschscholtzii ― Eschscholtz's buttercup
- Ranunculus flammula ― lesser spearwort, creeping spearwort, banewort
- Ranunculus occidentalis ― western buttercup
- Ranunculus uncinatus ― little buttercup
- Thalictrum occidentale ― western meadowrue
- Trautvetteria caroliniensis ― false bugbane
- Trollius laxus ― globeflower
Rhamnaceae
- Rhamnus purshiana — cascara buckthorn
Rosaceae
- Amelanchier alnifolia ― saskatoon, Pacific serviceberry
- Aruncus dioicus — goat's beard
- Geum calthifolium ― caltha-leaved avens
- Geum macrophyllum ― large-leaved avens
- Leutkea pectinata ― partridgefoot
- Oemleria cerasiformis — osoberry
- Physocarpus capitatus — Pacific ninebark
- Potentilla anserina ― silverweed
- Potentilla flabellifolia ― fan-leaved cinquefoil
- Potentilla villosa ― villous cinquefoil
- Rosa nutkana — Nootka rose
- Rubus parviflorus — thimbleberry
- Rubus spectabilis — salmonberry
- Rubus ursinus — trailing blackberry, California dewberry
- Sanguisorba canadensis ― Sitka burnet
- Sanguisorba officinales ― great burnet
- Sibbaldia procumbens ― sibbaldia
Salicaceae
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Sapindaceae
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Saxifragaceae
- Boykinia occidentalis ― coast boykinia, western boykinia
- Chrysosplenium glechomifolium ― Pacific golden saxifrage
- Heuchera glabra ― smooth alumroot
- Heuchera micrantha ― small-flowered alumroot
- Leptarrhena pyrolifolia ― leatherleaf saxifrage
- Lithophragma parviflorum ― small-flowered woodland star
- Micranthes ferruginea ― Alaska saxifrage
- Micranthes occidentalis ― western saxifrage
- Micranthes tolmiei ― Tolmie's saxifrage
- Mitella breweri ― brewer's mitrewort
- Mitella pentandra ― five-stamened mitrewort
- Saxifraga bronchialis ― spotted saxifrage, prickly saxifrage
- Saxifraga cespitosa ― tufted saxifrage
- Saxifraga oppositifolia ― purple mountain saxifrage
- Tellima grandiflora ― fringecup
- Tiarella trifoliata ― foamflower
- Tolmiea menziesii ― piggy-back plant, youth-on-age
Taxaceae
- Taxus brevifolia — Pacific yew
Tofieldiaceae
- Triantha occidentalis — western false asphodel
Zosteraceae
- Zostera marina — marine eelgrass