| Scientific Name (* Introduced) |
Family | Common Name | Habitat | Bloom Period |
| Artemisia tridentata ssp. vaseyana | Asteraceae | Vasey sagebrush, mountain big sagebrush | ||
| Artemisia tripartita ssp. tripartita | Asteraceae | threetip sagebrush, cutleaf sagebrush | ||
| Astragalus arrectus | Fabaceae | Palouse milk-vetch, hanging pod milk-vetch | ||
| Astragalus collinus var. collinus | Fabaceae | Hill milk-vetch, hillside milk-vetch | may, jun | |
| Astragalus microcystis | Fabaceae | dwarf milk-vetch, lesser-bladder milk-vetch | shrub-steppe | may |
| Astragalus spaldingii | Fabaceae | Spalding's milk-vetch | shrub-steppe | may |
| Botrychium minganense | Ophioglossaceae | Mingan moonwort | western forest, eastern forest, subalpine or alpine, freshwater | no flowers |
| Botrychium pedunculosum | Ophioglossaceae | stalked moonwort | eastern forest, subalpine or alpine | no flowers |
| Botrychium pinnatum | Ophioglossaceae | northern moonwort, northwestern or St. John's moonwort | western forest, eastern forest, subalpine or alpine | no flowers |
| Botrypus virginianus | Ophioglossaceae | |||
| Carex buxbaumii | Cyperaceae | Buxbaum's sedge, brown bog sedge | freshwater, saltwater shores | jun, jul, aug |
| Carex hystericina | Cyperaceae | bottlebrush sedge, porcupine sedge | freshwater | may |
| Centaurea solstitialis * | Asteraceae | yellow star-thistle, St. Barnaby's thistle | disturbed areas | jul, aug, sep |
| Cicuta bulbifera | Apiaceae | bulblet-bearing water-hemlock, bulbous water-hemlock | freshwater | aug, sep |
| Dicentra cucullaria | Papaveraceae | dutchman's-breeches | eastern forest | mar, apr, may |
| Dryopteris carthusiana | Dryopteridaceae | spinulose woodfern, toothed wood fern | western forest, eastern forest, freshwater | no flowers |
| Dryopteris expansa | Dryopteridaceae | spreading woodfern, northern woodfern | western forest, eastern forest, freshwater | no flowers |
| Echinochloa muricata var. microstachya | Poaceae | American barnyard grass, or watergrass | ||
| Elymus lanceolatus ssp. lanceolatus | Poaceae | thick-spiked wheatgrass | ||
| Equisetum scirpoides | Equisetaceae | dwarf scouring-rush, sedgelike horsetail | eastern forest, freshwater | no flowers |
| Equisetum sylvaticum | Equisetaceae | woodland horsetail, wood horsetail | eastern forest, freshwater | no flowers |
| Erigeron philadelphicus | Asteraceae | Philadelphia fleabane, Philadelphia daisy | western forest, eastern forest, freshwater, disturbed areas | apr, may, jun, jul, aug |
| Goodyera oblongifolia | Orchidaceae | western rattlesnake plantain, green-leaf rattlesnake-plantain | western forest, eastern forest | jul, aug |
| Helenium autumnale | Asteraceae | common sneezeweed, large flowered sneezeweed | freshwater, disturbed areas | aug, sep, oct |
| Hieracium glomeratum * | Asteraceae | |||
| Juncus effusus ssp. effusus * | Juncaceae | soft rush | ||
| Lathyrus pauciflorus var. pauciflorus | Fabaceae | Few-flowered peavine | apr, may, jun | |
| Myriopteris gracillima | Pteridaceae | lace fern, lace lip fern | eastern forest, prairie or bald, shrub-steppe | no flowers |
| Phoenicaulis cheiranthoides | Brassicaceae | wallflower phoenicaulis, dagger-pod | eastern forest, shrub-steppe | apr, may, jun |
| Physostegia parviflora | Lamiaceae | western false dragonhead, purple dragonhead | ||
| Ribes niveum | Grossulariaceae | snow currant, Snake River gooseberry, snow gooseberry | eastern forest, freshwater | apr, may |
| Rubus pubescens | Rosaceae | dwarf red blackberry | eastern forest, freshwater | may, jun, jul |
| Sceptridium multifidum | Ophioglossaceae | leathery grapefern | ||
| Sclerochloa dura * | Poaceae | common hardgrass | disturbed areas | jun |
| Shepherdia canadensis | Elaeagnaceae | russet buffaloberry, soopolallie, soapberry | western forest, eastern forest, prairie or bald, shrub-steppe | may, jun, jul |
| Sisyrinchium septentrionale | Iridaceae | northern blue-eyed grass | subalpine or alpine, freshwater | jun, jul |
| Sparganium angustifolium | Typhaceae | narrow-leaved bur-reed, floating bur-reed | freshwater | jul, aug, sep |
| Sparganium emersum | Typhaceae | simplestem bur-reed | ||
| Sphaeralcea munroana | Malvaceae | Munro's globemallow, white-stemmed globemallow | eastern forest, shrub-steppe | may, jun, jul, aug |
| Spinulum annotinum | Lycopodiaceae | |||
| Tellima grandiflora | Saxifragaceae | bigflower tellima, fringecup, fragrant fringecup | western forest, eastern forest | apr, may, jun, jul |
| Tonella floribunda | Plantaginaceae | manyflower tonella, greater baby-innocence, large-flowered tonella | eastern forest, shrub-steppe | apr, may, jun |
| Tragopogon mirus | Asteraceae | remarkable salsify, remarkable goatsbeard | disturbed areas | may, jun |
Data from Consortium of PNW Herbaria and Burke Herbarium Image Collection. Generated on January 24, 2022
More information on the PlantQuest Image Project can be found at https://biology.burke.washington.edu/herbarium/imagecollection/plantquest.php.