| Scientific Name (* Introduced) |
Family | Common Name | Habitat | Bloom Period |
| Acer glabrum var. douglasii | Sapindaceae | Douglas' maple, Rocky Mountain maple | apr, may, jun | |
| Achnatherum nelsonii ssp. nelsonii | Poaceae | |||
| Alopecurus carolinianus * | Poaceae | Carolina foxtail, tufted meadow foxtail | may | |
| Alopecurus myosuroides * | Poaceae | slender meadow foxtail | disturbed areas | jun, jul, aug |
| Alopecurus saccatus | Poaceae | Pacific foxtail, Pacific meadow foxtail | may | |
| Antennaria luzuloides | Asteraceae | woodrush pussytoes, silvery brown everlasting | eastern forest, shrub-steppe | may, jun, jul |
| Arctostaphylos uva-ursi | Ericaceae | kinnikinnick, red bearberry | western forest, eastern forest, prairie or bald, subalpine or alpine | apr, may, jun |
| Artemisia tripartita ssp. tripartita | Asteraceae | threetip sagebrush, cutleaf sagebrush | ||
| Astragalus collinus var. collinus | Fabaceae | Hill milk-vetch, hillside milk-vetch | may, jun | |
| Betula papyrifera | Betulaceae | paper birch | western forest, eastern forest, freshwater | mar, apr, may |
| Bromus hordeaceus * | Poaceae | soft brome, soft chess | disturbed areas | may, jun, jul |
| Buglossoides arvensis * | Boraginaceae | field gromwell, corn gromwell | eastern forest, shrub-steppe | apr, may, jun |
| Castilleja tenuis | Orobanchaceae | hairy Indian paintbrush, thin paintbrush | western forest, eastern forest, freshwater | may, jun, jul, aug |
| Collomia tenella | Polemoniaceae | diffuse collomia, diffuse mountain-trumpet | eastern forest, shrub-steppe | jun, jul |
| Delphinium distichum | Ranunculaceae | two-spike larkspur | eastern forest, shrub-steppe, freshwater | may, jun, jul |
| Delphinium xantholeucum | Ranunculaceae | yellow-white larkspur | eastern forest, shrub-steppe | apr, may, jun |
| Drymocallis arguta | Rosaceae | |||
| Elatine californica | Elatinaceae | California waterwort | ||
| Eleocharis quinqueflora | Cyperaceae | few-flowered spike-rush | freshwater | jun, jul, aug |
| Elymus wawawaiensis | Poaceae | Wawawai wildrye | ||
| Eriogonum compositum var. compositum | Polygonaceae | Northern buckwheat | may, jun, jul | |
| Erythranthe breviflora | Phrymaceae | short-flower monkey-flower | freshwater | may, jun, jul |
| Geranium carolinianum | Geraniaceae | Carolina geranium | western forest, eastern forest, disturbed areas | apr, may, jun, jul |
| Hippuris vulgaris | Plantaginaceae | common mare's-tail | freshwater | jun, jul, aug |
| Holosteum umbellatum ssp. umbellatum * | Caryophyllaceae | |||
| Juncus uncialis | Juncaceae | twelfth rush, inch-high rush | freshwater | may, jun |
| Lupinus polyphyllus var. prunophilus | Fabaceae | large-leaved lupine | ||
| Lycium barbarum * | Solanaceae | matrimony-vine | disturbed areas | jun, jul, aug, sep |
| Mahonia aquifolium | Berberidaceae | |||
| Mentzelia dispersa | Loasaceae | bushy blazing-star | eastern forest, shrub-steppe | may, jun, jul |
| Microseris nutans | Asteraceae | nodding microseris, nodding scorzonella, nodding silverpuffs | eastern forest, shrub-steppe | apr, may, jun, jul |
| Navarretia intertexta | Polemoniaceae | needleleaf navarretia | western forest, eastern forest, shrub-steppe | jun, jul, aug |
| Navarretia leucocephala ssp. diffusa | Polemoniaceae | diffuse navarretia | ||
| Plagiobothrys hispidulus | Boraginaceae | |||
| Polemonium pectinatum | Polemoniaceae | Washington polemonium, Washington Jacob's-ladder | freshwater | may, jun |
| Polygonum douglasii | Polygonaceae | Douglas' knotweed, Austin's knotweed | western forest, eastern forest, prairie or bald, shrub-steppe | jun, jul, aug, sep |
| Ranunculus macounii | Ranunculaceae | Macoun's buttercup | eastern forest, freshwater | may, jun, jul |
| Schoenoplectus saximontanus | Cyperaceae | Rocky Mountain bulrush | ||
| Symphyotrichum spathulatum | Asteraceae | western mountain aster | eastern forest, shrub-steppe | jul, aug, sep |
| Trifolium cyathiferum | Fabaceae | cup clover, bowl clover | eastern forest, freshwater | may, jun, jul |
| Trifolium variegatum | Fabaceae | white-tip clover | western forest, eastern forest, prairie or bald, shrub-steppe, freshwater | apr, may, jun, jul |
| Triglochin scilloides | Juncaginaceae | flowering quillwort | ||
| Veronica rubra | Plantaginaceae | |||
| Vicia villosa var. villosa * | Fabaceae |
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.