| Scientific Name (* Introduced) |
Family | Common Name | Habitat | Bloom Period |
| Agoseris grandiflora var. grandiflora | Asteraceae | large flowered agoseris, large flower goat-chicory | ||
| Allium douglasii | Amaryllidaceae | Douglas' onion | eastern forest, shrub-steppe | may, jun, jul |
| Angelica arguta | Apiaceae | Lyall's angelica, sharptooth angelica | western forest, eastern forest, freshwater | jun, jul, aug |
| Aquilegia formosa var. formosa | Ranunculaceae | red columbine, western columbine, Sitka columbine | ||
| Arctostaphylos uva-ursi | Ericaceae | kinnikinnick, red bearberry | western forest, eastern forest, prairie or bald, subalpine or alpine | apr, may, jun |
| Artemisia ludoviciana ssp. ludoviciana | Asteraceae | Prairie sage, western mugwort | jun, jul, aug, sep, oct | |
| Astragalus arrectus | Fabaceae | Palouse milk-vetch, hanging pod milk-vetch | ||
| Astragalus riparius | Fabaceae | woodyroot milk-vetch, Piper's milk-vetch | shrub-steppe | may |
| Astragalus spaldingii | Fabaceae | Spalding's milk-vetch | shrub-steppe | may |
| Astragalus whitneyi var. sonneanus | Fabaceae | Balloon milk-vetch | may, jun, jul, aug | |
| Athysanus pusillus | Brassicaceae | common sandweed | eastern forest, prairie or bald, shrub-steppe | mar, apr, may, jun |
| Carex geyeri | Cyperaceae | Geyer's sedge, elk sedge | eastern forest | may |
| Cirsium vulgare * | Asteraceae | bull thistle, common thistle | disturbed areas | jun, jul, aug, sep |
| Claytonia cordifolia | Montiaceae | heart-leaf springbeauty, broad-leaf springbeauty | western forest, eastern forest, freshwater | may, jun, jul, aug, sep |
| Clematis hirsutissima | Ranunculaceae | eastern forest, shrub-steppe | may, jun | |
| Comandra umbellata ssp. pallida | Santalaceae | |||
| Cryptantha flaccida | Boraginaceae | weakstem cryptantha, flaccid cryptantha, weakstem cat's eye | shrub-steppe | may, jun |
| Elymus trachycaulus ssp. trachycaulus | Poaceae | bearded wheatgrass | jun, jul, aug | |
| Equisetum hyemale ssp. affine | Equisetaceae | common scouring rush, Dutch rush, prairie scouring rush | ||
| Erigeron glacialis var. glacialis | Asteraceae | |||
| Heracleum maximum | Apiaceae | common cow-parsnip, American cow-parsnip | western forest, eastern forest, freshwater | jun, jul, aug |
| Hieracium albiflorum | Asteraceae | white hawkweed, white-flowered hawkweed | western forest, eastern forest | jun, jul, aug, sep |
| Hydrophyllum fendleri var. albifrons | Hydrophyllaceae | Fendler's waterleaf | western forest, eastern forest | may, jun, jul, aug |
| Lathyrus lanszwertii var. bijugatus | Fabaceae | |||
| Ligusticum canbyi | Apiaceae | Canby's licorice-root, Canby's wild lovage | subalpine or alpine | may, jun, jul, aug |
| Lomatium salmoniflorum | Apiaceae | salmonflower biscuitroot, Salmon River desert-parsley | shrub-steppe | mar, apr |
| Lupinus leucophyllus var. leucophyllus | Fabaceae | velvet lupine | ||
| Madia exigua | Asteraceae | small tarweed, threadstem madia, little tarplant | eastern forest, shrub-steppe | may, jun, jul |
| Micranthes integrifolia | Saxifragaceae | wholeleaf saxifrage | western forest, eastern forest, prairie or bald, shrub-steppe, subalpine or alpine, freshwater | mar, apr, may, jun, jul |
| Pedicularis bracteosa var. pachyrhiza | Orobanchaceae | Bracted lousewort | jun, jul, aug | |
| Populus tremuloides | Salicaceae | quaking aspen | western forest, eastern forest, shrub-steppe, freshwater | mar, apr, may |
| Ranunculus populago | Ranunculaceae | mountain buttercup, popular buttercup | western forest, eastern forest | apr, may, jun, jul, aug |
| Ribes oxyacanthoides var. cognatum | Grossulariaceae | Umatilla gooseberry | mar, apr, may | |
| Rudbeckia occidentalis | Asteraceae | western coneflower, western chocolate cone | eastern forest, freshwater | jun, jul, aug |
| Sanicula graveolens | Apiaceae | northern sanicle, Sierran black-snakeroot | western forest, eastern forest | may, jun, jul |
| Sedum lanceolatum | Crassulaceae | spearleaf stonecrop | eastern forest, prairie or bald, shrub-steppe, subalpine or alpine | may, jun, jul, aug |
| Senecio serra var. serra | Asteraceae | butterweed groundsel, tall butterweed | ||
| Symphyotrichum jessicae | Asteraceae | Jessica's aster, Palouse aster | eastern forest, shrub-steppe, freshwater | aug, sep |
| Tragopogon porrifolius * | Asteraceae | purple oyster salsify, purple oyster plant | disturbed areas | apr, may, jun, jul, aug |
| Veronica missurica ssp. major | Plantaginaceae | |||
| Viola purpurea ssp. venosa | Violaceae |
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.