| Scientific Name (* Introduced) |
Family | Common Name | Habitat | Bloom Period |
| Artemisia tridentata ssp. tridentata | Asteraceae | big sagebrush | ||
| Astragalus arrectus | Fabaceae | Palouse milk-vetch, hanging pod milk-vetch | ||
| Astragalus caricinus | Fabaceae | buckwheat milk-vetch | shrub-steppe | apr, may |
| Boechera pauciflora | Brassicaceae | sicklepod rockcress, hairy-stem rockcress, fuzzy rockcress | eastern forest, shrub-steppe | apr, may, jun |
| Boechera sparsiflora | Brassicaceae | eastern forest, shrub-steppe | may, jun, jul | |
| Cirsium undulatum | Asteraceae | wavy-leaf thistle | eastern forest, shrub-steppe, disturbed areas | may, jun, jul, aug, sep, oct |
| Clematis hirsutissima | Ranunculaceae | eastern forest, shrub-steppe | may, jun | |
| Cryptantha fendleri | Boraginaceae | sanddune cryptantha, Fendler's cryptantha, sand dune cat's eye | may | |
| Cymopterus foeniculaceus | Apiaceae | |||
| Cyperus bipartitus | Cyperaceae | slender flatsedge, shining flatsedge | freshwater | jun, jul, aug |
| Deschampsia danthonioides | Poaceae | annual hair-grass | may | |
| Drymocallis arguta | Rosaceae | |||
| Eleocharis acicularis | Cyperaceae | needle spikerush | freshwater, disturbed areas | jun, jul, aug, sep |
| Equisetum ferrissii | Equisetaceae | Ferriss' scouring rush | no flowers | |
| Eragrostis cilianensis * | Poaceae | stink-grass, stink grass | disturbed areas | jun, jul, aug, sep, oct |
| Erigeron piperianus | Asteraceae | Piper's fleabane | shrub-steppe | may, jun |
| Eriogonum compositum var. leianthum | Polygonaceae | northern buckwheat | may, jun, jul | |
| Eriogonum microtheca var. laxiflorum | Polygonaceae | |||
| Eriogonum strictum var. anserinum | Polygonaceae | |||
| Eriophyllum lanatum var. lanatum | Asteraceae | Woolly sunflower, common eriophyllum | may, jun, jul, aug | |
| Gratiola neglecta | Plantaginaceae | clammy hedgehyssop, American hedge-hyssop | freshwater | jun, jul, aug |
| Greeneocharis circumscissa | Boraginaceae | |||
| Hordeum brachyantherum | Poaceae | meadow barley | subalpine or alpine, saltwater shores, disturbed areas | jun, jul, aug |
| Lathyrus lanszwertii var. bijugatus | Fabaceae | |||
| Lomatium salmoniflorum | Apiaceae | salmonflower biscuitroot, Salmon River desert-parsley | shrub-steppe | mar, apr |
| Madia exigua | Asteraceae | small tarweed, threadstem madia, little tarplant | eastern forest, shrub-steppe | may, jun, jul |
| Marsilea vestita | Marsileaceae | hairy clover-fern, water-clover or pepperwort | freshwater | no flowers |
| Microgilia minutiflora | Polemoniaceae | |||
| Myosurus apetalus | Ranunculaceae | bristly mousetail, sedge mouse-tail | eastern forest, shrub-steppe, subalpine or alpine | may |
| Oreocarya spiculifera | Boraginaceae | |||
| Pascopyrum smithii | Poaceae | western wheatgrass | ||
| Penstemon attenuatus var. attenuatus | Plantaginaceae | Sulfur penstemon, taper-leaved penstemon | jun, jul, aug | |
| Penstemon triphyllus | Plantaginaceae | Riggin's penstemon, whorled beardtongue | eastern forest, shrub-steppe | may, jun, jul |
| Physaria douglasii ssp. tuplashensis | Brassicaceae | White Bluffs bladderpod | ||
| Potamogeton foliosus | Potamogetonaceae | leafy pondweed, fibrous-stipuled pondweed | freshwater | |
| Ribes cereum | Grossulariaceae | wax currant | eastern forest, shrub-steppe, subalpine or alpine | apr, may, jun |
| Sagittaria cuneata | Alismataceae | arumleaf arrowhead | freshwater | jun, jul, aug |
| Solidago missouriensis | Asteraceae | Missouri goldenrod | western forest, eastern forest, prairie or bald, shrub-steppe, disturbed areas | jun, jul, aug, sep, oct |
| Symphyotrichum lanceolatum var. hesperium | Asteraceae | lance-leaved or panicled or white panicled aster | ||
| Taeniatherum caput-medusae * | Poaceae | medusa-head | shrub-steppe, disturbed areas | may, jun |
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.