| 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 |
| Allium geyeri | Amaryllidaceae | Geyer's onion | may | |
| Anticlea occidentalis | Melanthiaceae | western featherbells, mission bells, bronze bells | western forest, eastern forest, subalpine or alpine, freshwater | jun, jul, aug |
| Artemisia rigida | Asteraceae | scabland sagebrush, stiff sagebrush | eastern forest, shrub-steppe | sep, oct |
| Carex leptalea | Cyperaceae | bristlystalked sedge | freshwater | may |
| Carex limosa | Cyperaceae | mud sedge | freshwater | jun, jul, aug |
| Carex nebrascensis | Cyperaceae | Nebraska sedge | freshwater | may |
| Castilleja tenuis | Orobanchaceae | hairy Indian paintbrush, thin paintbrush | western forest, eastern forest, freshwater | may, jun, jul, aug |
| Chenopodium album * | Amaranthaceae | lambsquarters | disturbed areas | jun, jul, aug, sep |
| Danthonia unispicata | Poaceae | onespike danthonia, few-flower wild oat-grass | shrub-steppe, subalpine or alpine | jun, jul |
| Delphinium burkei | Ranunculaceae | |||
| Delphinium distichum | Ranunculaceae | two-spike larkspur | eastern forest, shrub-steppe, freshwater | may, jun, jul |
| Dodecatheon pulchellum var. pulchellum | Primulaceae | dark-throated shooting star | ||
| Downingia elegans | Campanulaceae | elegant calicoflower, common downingia | freshwater | jun, jul, aug |
| Elatine californica | Elatinaceae | California waterwort | ||
| Elymus trachycaulus ssp. trachycaulus | Poaceae | bearded wheatgrass | jun, jul, aug | |
| Festuca campestris | Poaceae | rough fescue, prairie fescue | ||
| Hesperochiron pumilus | Hydrophyllaceae | dwarf hesperochiron, dwarf monkey-fiddle | eastern forest, shrub-steppe | apr, may, jun |
| Heteranthera dubia | Pontederiaceae | grassleaf mud-plantain, water stargrass | freshwater | jul, aug, sep |
| Holosteum umbellatum * | Caryophyllaceae | jagged chickweed | shrub-steppe, disturbed areas | apr, may |
| Juncus nevadensis var. nevadensis | Juncaceae | Sierra rush | jul, aug | |
| Lemna trisulca | Araceae | star duckweed, ivy or ivy-leaved duckweed | freshwater | jun, jul, aug, sep |
| Lomatium farinosum | Apiaceae | northern biscuitroot | eastern forest, shrub-steppe | apr, may |
| Lomatium gormanii | Apiaceae | Gorman's biscuitroot, Gorman's desert-parsley, salt and pepper | eastern forest, shrub-steppe | mar, apr, may |
| Marsilea vestita | Marsileaceae | hairy clover-fern, water-clover or pepperwort | freshwater | no flowers |
| Melilotus albus * | Fabaceae | disturbed areas | may, jun, jul, aug, sep, oct | |
| Myosurus minimus | Ranunculaceae | tiny mousetail | western forest, eastern forest, prairie or bald, freshwater | mar, apr, may, jun |
| Navarretia intertexta | Polemoniaceae | needleleaf navarretia | western forest, eastern forest, shrub-steppe | jun, jul, aug |
| Nothocalais troximoides | Asteraceae | weevil prairie-dandelion, false agoseris | eastern forest, shrub-steppe | apr, may, jun |
| Potamogeton zosteriformis | Potamogetonaceae | flat-stem pondweed, eel-grass pondweed | freshwater | |
| Rhododendron menziesii | Ericaceae | |||
| Ribes aureum | Grossulariaceae | golden currant | eastern forest, shrub-steppe | apr, may |
| Ribes oxyacanthoides var. cognatum | Grossulariaceae | Umatilla gooseberry | mar, apr, may | |
| Sagittaria cuneata | Alismataceae | arumleaf arrowhead | freshwater | jun, jul, aug |
| Schoenoplectus saximontanus | Cyperaceae | Rocky Mountain bulrush | ||
| Senecio hydrophiloides | Asteraceae | tall groundsel, sweet marsh butterweed, stout meadow groundsel | freshwater | jun, jul |
| Sium suave | Apiaceae | hemlock water-parsnip, water parsnip | freshwater | jul, aug |
| Stellaria nitens | Caryophyllaceae | shiny chickweed, shiny starwort | prairie or bald, shrub-steppe, freshwater | apr, may, jun |
| Trifolium cyathiferum | Fabaceae | cup clover, bowl clover | eastern forest, freshwater | may, jun, jul |
| Valeriana sitchensis | Valerianaceae | Sitka valerian | western forest, eastern forest, subalpine or alpine, freshwater | jun, jul, aug |
| Viola nuttallii var. vallicola | 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.