| Scientific Name (* Introduced) |
Family | Common Name | Habitat | Bloom Period |
| Allium acuminatum | Amaryllidaceae | taper-tip onion | western forest, prairie or bald, shrub-steppe | may, jun, jul |
| Ambrosia acanthicarpa | Asteraceae | flat-spine bur ragweed, bur ragweed, annual bursage | shrub-steppe | jul, aug, sep, oct |
| Amsinckia intermedia | Boraginaceae | |||
| Aphyllon fasciculatum | Orobanchaceae | |||
| Asparagus officinalis * | Asparagaceae | garden asparagus | freshwater, disturbed areas | jul, aug |
| Astragalus cusickii | Fabaceae | Cusick's milk-vetch | shrub-steppe | may, jun, jul |
| Astragalus cusickii var. cusickii | Fabaceae | Cusick's milk-vetch | may, jun, jul | |
| Calochortus eurycarpus | Liliaceae | white mariposa lily, wide-fruited mariposa, big-pod mariposa lily | eastern forest, shrub-steppe | jun, jul, aug |
| Calochortus macrocarpus var. maculosus | Liliaceae | sagebrush mariposa | ||
| Camassia quamash ssp. quamash | Asparagaceae | Common camas | apr, may, jun | |
| Celtis reticulata | Cannabaceae | netleaf hackberry | eastern forest, shrub-steppe, freshwater | apr, may |
| Chorispora tenella * | Brassicaceae | crossflower, blue mustard | eastern forest, shrub-steppe, disturbed areas | mar, apr, may, jun |
| Comandra umbellata ssp. pallida | Santalaceae | |||
| Crocidium multicaule | Asteraceae | common spring-gold, gold star | eastern forest, prairie or bald, shrub-steppe, disturbed areas | mar, apr, may, jun, nov-feb |
| Erigeron corymbosus | Asteraceae | longleaf fleabane, foothill daisy | eastern forest, shrub-steppe | jun, jul, aug |
| Erigeron divergens | Asteraceae | spreading fleabane | may, jun, jul | |
| Euthamia occidentalis | Asteraceae | western goldentop, western goldenrod | shrub-steppe, freshwater | jul, aug, sep, oct |
| Glossopetalon spinescens var. aridum | Crossosomataceae | Spiny green-bush | apr, may, jun | |
| Glycyrrhiza lepidota | Fabaceae | American licorice, wild licorice | freshwater, disturbed areas | may, jun, jul, aug |
| Helianthella uniflora var. douglasii | Asteraceae | Rocky Mountain helianthella | may, jun, jul, aug | |
| Hesperostipa comata ssp. comata | Poaceae | Needlegrass, needle-and-thread | may, jun, jul | |
| Lepidium virginicum ssp. menziesii | Brassicaceae | tall peppergrass | eastern forest, prairie or bald, shrub-steppe | apr, may, jun |
| Lindernia dubia | Linderniaceae | false pimpernel | freshwater | apr, may, jun, jul, aug, sep, oct |
| Lomatium rollinsii | Apiaceae | Rollins' biscuitroot, rollins' desert-parsley | shrub-steppe | apr |
| Lomatium serpentinum | Apiaceae | sweetscented biscuitroot, Snake Canyon desert-parsley | shrub-steppe | apr, may, jun, jul |
| Lupinus sericeus var. asotinensis | Fabaceae | Asotin silk lupine | ||
| Morus alba * | Moraceae | white mulberry | freshwater, disturbed areas | apr, may, jun |
| Oenothera curtiflora * | Onagraceae | velvet weed | eastern forest, disturbed areas | jun, jul, aug, sep |
| Oenothera pallida | Onagraceae | pale evening-primrose, pale evening-primrose | eastern forest, shrub-steppe | may |
| Parietaria pensylvanica | Urticaceae | Pennsylvania pellitory | eastern forest, shrub-steppe, freshwater, disturbed areas | may, jun, jul, aug, sep |
| Penstemon glandulosus var. glandulosus | Plantaginaceae | Glandular penstemon, sticky-st penstemon | may, jun, jul | |
| Penstemon triphyllus | Plantaginaceae | Riggin's penstemon, whorled beardtongue | eastern forest, shrub-steppe | may, jun, jul |
| Plantago patagonica | Plantaginaceae | woolly plantain | eastern forest, shrub-steppe | apr, may, jun |
| Poa secunda ssp. juncifolia | Poaceae | |||
| Prunus mahaleb * | Rosaceae | Mahaleb cherry | disturbed areas | may, jun |
| Ribes niveum | Grossulariaceae | snow currant, Snake River gooseberry, snow gooseberry | eastern forest, freshwater | apr, may |
| Robinia pseudoacacia * | Fabaceae | black locust | freshwater, disturbed areas | may |
| Sedum leibergii | Crassulaceae | Leiberg's stonecrop | shrub-steppe | may, jun, jul |
| Sphaeralcea munroana | Malvaceae | Munro's globemallow, white-stemmed globemallow | eastern forest, shrub-steppe | may, jun, jul, aug |
| Thelypodium milleflorum | Brassicaceae | many-flowered thelypody | eastern forest, shrub-steppe | apr, may, jun, jul |
| Trifolium repens * | Fabaceae | white clover, Dutch clover | western forest, eastern forest, disturbed areas | may |
| Tripidium ravennae * | Poaceae | ravennagrass | ||
| Viola nuttallii var. praemorsa | Violaceae | |||
| Woodsia oregana ssp. oregana | Woodsiaceae | Oregon or western cliff fern | ||
| Xanthium strumarium | Asteraceae | rough cockleburr, Canada cocklebur, common cocklebur | freshwater, disturbed areas | jul, aug, sep, oct |
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.