| Scientific Name (* Introduced) |
Family | Common Name | Habitat | Bloom Period |
| Antennaria dimorpha | Asteraceae | low pussytoes, cushion pussytoes | shrub-steppe | apr, may |
| Apocynum cannabinum | Apocynaceae | Indian-hemp | freshwater, disturbed areas | jun, jul, aug, sep |
| Astragalus hoodianus | Fabaceae | Hood River milk-vetch | shrub-steppe | may |
| Astragalus purshii var. glareosus | Fabaceae | Pursh's milk-vetch | apr, may, jun | |
| Astragalus reventiformis | Fabaceae | Yakima milk-vetch | eastern forest, shrub-steppe | apr, may, jun |
| Astragalus speirocarpus | Fabaceae | threadstalk milk-vetch, medic milk-vetch, curve-pod milk-vetch, spiral-pod milk-vetch | shrub-steppe | may |
| Athysanus pusillus | Brassicaceae | common sandweed | eastern forest, prairie or bald, shrub-steppe | mar, apr, may, jun |
| Balsamorhiza hookeri | Asteraceae | Hooker's balsamroot, hairy balsamroot | eastern forest, shrub-steppe | apr, may, jun |
| Camissonia contorta | Onagraceae | plains evening-primrose, twisted suncup, contorted pod suncup | shrub-steppe | apr, may, jun |
| Cardamine occidentalis | Brassicaceae | big western bittercress | may | |
| Clarkia quadrivulnera | Onagraceae | |||
| Cryptantha flaccida | Boraginaceae | weakstem cryptantha, flaccid cryptantha, weakstem cat's eye | shrub-steppe | may, jun |
| Dodecatheon conjugens | Primulaceae | Bonneville shooting star, slimpod shooting star, desert shooting star | eastern forest, shrub-steppe, subalpine or alpine | apr, may, jun |
| Downingia elegans | Campanulaceae | elegant calicoflower, common downingia | freshwater | jun, jul, aug |
| Eragrostis hypnoides | Poaceae | teal lovegrass | freshwater, disturbed areas | jun, jul, aug, sep |
| Erigeron linearis | Asteraceae | desert yellow fleabane, desert yellow daisy, lineleaf fleabane | eastern forest, shrub-steppe | may, jun, jul |
| Eryngium petiolatum | Apiaceae | rush-leaf eryngo, Oregon eryngo | freshwater | jun, jul, aug |
| Lindernia dubia | Linderniaceae | false pimpernel | freshwater | apr, may, jun, jul, aug, sep, oct |
| Lomatium canbyi | Apiaceae | Canby's biscuitroot, Canby's desert-parsley, chucklusa | shrub-steppe | mar, apr |
| Lomatium columbianum | Apiaceae | Columbia Gorge desert-parsley | shrub-steppe | mar, apr |
| Lomatium macrocarpum | Apiaceae | bigseed biscuitroot, large-fruit desert-parsley, bigseed lomatium | shrub-steppe | mar, apr, may |
| Lomatium piperi | Apiaceae | Indian biscuitroot | shrub-steppe | apr, may, jun |
| Lomatium tamanitchii | Apiaceae | |||
| Lomatium watsonii | Apiaceae | Watson's desert-parsley | shrub-steppe | may |
| Lupinus sulphureus var. bingenensis | Fabaceae | |||
| Nothocalais troximoides | Asteraceae | weevil prairie-dandelion, false agoseris | eastern forest, shrub-steppe | apr, may, jun |
| Panicum capillare ssp. capillare | Poaceae | witchgrass, or common panicgrass | ||
| Perideridia montana | Apiaceae | |||
| Persicaria maculosa * | Polygonaceae | spotted lady's-thumb, redshank | freshwater, disturbed areas | mar, apr, may, jun, jul, aug |
| Phlox longifolia | Polemoniaceae | long-leaf phlox | eastern forest, shrub-steppe | apr, may, jun |
| Quercus garryana var. garryana | Fagaceae | Garry oak, Oregon white oak | ||
| Rosa woodsii | Rosaceae | Wood's rose, pearhip rose | eastern forest, shrub-steppe, freshwater | may, jun, jul |
| Salix amygdaloides | Salicaceae | peach-leaf willow | freshwater | mar, apr, may |
| Salix lasiolepis | Salicaceae | arroyo willow | freshwater | apr, may, jun |
| Salix prolixa | Salicaceae | MacKenzie's willow | freshwater | apr, may, jun |
| Sisymbrium altissimum * | Brassicaceae | tall tumblemustard, tall rocket mustard, Jim Hill mustard | eastern forest, shrub-steppe, disturbed areas | may, jun, jul, aug, sep |
| Trifolium variegatum | Fabaceae | white-tip clover | western forest, eastern forest, prairie or bald, shrub-steppe, freshwater | apr, may, jun, jul |
| Triteleia hyacinthina | Asparagaceae | white triteleia, white brodiaea, fool's-onion | western forest, eastern forest, prairie or bald, shrub-steppe | may, jun, jul, aug |
| Veronica anagallis-aquatica * | Plantaginaceae | water speedwell, blue speedwell | freshwater, disturbed areas | jun, jul, aug, sep |
| Viola trinervata | Violaceae | Rainier violet, sagebrush violet, 3-nerved violet | shrub-steppe | mar, apr, may, jun |
| Vulpia microstachys | Poaceae | small fescue, Nuttall's fescue |
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.