| Scientific Name (* Introduced) |
Family | Common Name | Habitat | Bloom Period |
| Acer glabrum var. douglasii | Sapindaceae | Douglas' maple, Rocky Mountain maple | apr, may, jun | |
| Acmispon denticulatus | Fabaceae | toothed lotus | prairie or bald | may, jun |
| Arctostaphylos columbiana | Ericaceae | hairy manzanita, bristly manzanita | western forest, prairie or bald | may, jun, jul |
| Bromus vulgaris | Poaceae | Columbia brome | western forest, eastern forest | jun, jul, aug |
| Carex exsiccata | Cyperaceae | western inflated sedge, oxbow sedge, big inflated sedge | freshwater | jun, jul, aug, sep |
| Castilleja victoriae | Orobanchaceae | Victoria's paintbrush | prairie or bald | may, jun |
| Clarkia amoena | Onagraceae | farewell to spring, yellow clarkia | prairie or bald | may, jun, jul |
| Claytonia exigua ssp. glauca | Montiaceae | pallid Claytonia | ||
| Crataegus gaylussacia | Rosaceae | huckleberry hawthorn, Suksdorf hawthorn | western forest, eastern forest, prairie or bald | apr, may, jun |
| Cryptogramma acrostichoides | Pteridaceae | American rockbrake, American parsley fern | western forest, eastern forest, subalpine or alpine | no flowers |
| Elymus trachycaulus ssp. trachycaulus | Poaceae | bearded wheatgrass | jun, jul, aug | |
| Epipactis helleborine * | Orchidaceae | garden helleborine | freshwater, disturbed areas | jun, jul, aug, sep, oct |
| Festuca rubra ssp. juncea | Poaceae | |||
| Festuca rubra ssp. mediana | Poaceae | |||
| Fragaria virginiana ssp. glauca | Rosaceae | |||
| Gamochaeta ustulata | Asteraceae | purple cudweed, spoon-leaved purple everlasting | disturbed areas | apr, may, jun, jul, aug, sep, oct |
| Lilium columbianum | Liliaceae | Columbian lily | western forest, eastern forest, shrub-steppe, subalpine or alpine | may, jun, jul, aug |
| Malus domestica * | Rosaceae | apple, cultivated apple | disturbed areas | apr, may, jun |
| Moehringia macrophylla | Caryophyllaceae | large-leaf sandwort | western forest, eastern forest | may, jun, jul, aug |
| Oxytropis campestris var. spicata | Fabaceae | |||
| Packera macounii | Asteraceae | Siskiyou Mountain ragwort, Puget butterweed, long rayed groundsel, Macoun's groundsel | western forest | may, jun, jul |
| Petroselinum crispum * | Apiaceae | |||
| Plagiobothrys cusickii | Boraginaceae | |||
| Plagiobothrys scouleri | Boraginaceae | Scouler's popcorn flower | western forest, eastern forest, prairie or bald, freshwater | may, jun, jul, aug |
| Plantago elongata | Plantaginaceae | prairie plantain, slender plantain | prairie or bald, saltwater shores | apr, may, jun |
| Platanthera unalascensis | Orchidaceae | |||
| Poa compressa * | Poaceae | Canada bluegrass, flat-stem bluegrass | disturbed areas | jun, jul, aug |
| Poa secunda ssp. secunda | Poaceae | Sandberg bluegrass, curly bluegrass | shrub-steppe, subalpine or alpine, saltwater shores | may, jun, jul, aug, sep |
| Polemonium pulcherrimum var. pulcherrimum | Polemoniaceae | showy Jacob's-ladder | ||
| Polygonum aviculare ssp. buxiforme * | Polygonaceae | American knotweed | ||
| Potamogeton obtusifolius | Potamogetonaceae | blunt-leaved pondweed, blunt-leaved pondweed | freshwater | |
| Quercus garryana var. garryana | Fagaceae | Garry oak, Oregon white oak | ||
| Ranunculus californicus | Ranunculaceae | prairie or bald | apr, may, jun | |
| Rumex salicifolius var. transitorius | Polygonaceae | |||
| Sagina maxima ssp. maxima | Caryophyllaceae | |||
| Sanicula arctopoides | Apiaceae | footsteps of spring, footsteps-of-spring, bear's-foot sanicle | prairie or bald, saltwater shores | mar, apr, may |
| Saxifraga austromontana | Saxifragaceae | |||
| Sedum lanceolatum | Crassulaceae | spearleaf stonecrop | eastern forest, prairie or bald, shrub-steppe, subalpine or alpine | may, jun, jul, aug |
| Sherardia arvensis * | Rubiaceae | blue field-madder | prairie or bald, disturbed areas | apr, may, jun, jul |
| Sorbus intermedia * | Rosaceae | Swedish whitebeam | ||
| Spergularia macrotheca var. macrotheca | Caryophyllaceae | beach sandspurry | prairie or bald, saltwater shores | jun, jul, aug, sep |
| Trifolium dichotomum | Fabaceae | branched Indian clover | prairie or bald | apr, 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.