| Scientific Name (* Introduced) |
Family | Common Name | Habitat | Bloom Period |
| Angelica genuflexa | Apiaceae | kneeling angelica | freshwater | jul, aug |
| Anthoxanthum odoratum * | Poaceae | sweet vernalgrass | prairie or bald, disturbed areas | apr, may, jun |
| Brasenia schreberi | Cabombaceae | watershield | freshwater | jul, aug, sep |
| Calystegia soldanella | Convolvulaceae | |||
| Carex arcta | Cyperaceae | northern clustered sedge | freshwater | jun, jul, aug |
| Carex bolanderi | Cyperaceae | Bolander's sedge | ||
| Carex circinata | Cyperaceae | coiled sedge | ||
| Carex exsiccata | Cyperaceae | western inflated sedge, oxbow sedge, big inflated sedge | freshwater | jun, jul, aug, sep |
| Cinna latifolia | Poaceae | drooping woodreed, slender woodreed | western forest, eastern forest, freshwater | jun, jul, aug |
| Dodecatheon hendersonii | Primulaceae | broad-leaved shooting star, Henderson's shooting star, mosquito bills | western forest, prairie or bald | mar, apr, may, jun |
| Eleocharis macrostachya | Cyperaceae | creeping spikerush | ||
| Epilobium brachycarpum | Onagraceae | tall annual willowherb, autumn willowherb | western forest, eastern forest, prairie or bald | jul, aug |
| Frangula purshiana | Rhamnaceae | buckthorn | western forest, eastern forest | apr, may |
| Gamochaeta ustulata | Asteraceae | purple cudweed, spoon-leaved purple everlasting | disturbed areas | apr, may, jun, jul, aug, sep, oct |
| Hosackia rosea | Fabaceae | |||
| Hypochaeris radicata * | Asteraceae | hairy cat's-ear, rough cat's ear | prairie or bald, disturbed areas | may, jun, jul, aug, sep, oct |
| Isoetes occidentalis | Isoetaceae | western quillwort | freshwater | no flowers |
| Isoetes tenella | Isoetaceae | narrow-leaved quillwort | freshwater | no flowers |
| Juncus covillei | Juncaceae | |||
| Juncus nevadensis var. inventus | Juncaceae | |||
| Kalmia microphylla var. occidentalis | Ericaceae | Western swamp laurel | western forest, freshwater | may, jun, jul |
| Lathyrus littoralis | Fabaceae | silky beach pea, beach peavine, silky beach vetchling | saltwater shores | may, jun, jul |
| Lobelia dortmanna | Campanulaceae | Dortmann's lobelia, water lobelia | freshwater | jun, jul, aug |
| Maianthemum racemosum ssp. amplexicaule | Asparagaceae | False spikenard, western solomon-plume | apr, may, jun, jul | |
| Morella californica | Myricaceae | Pacific bayberry | freshwater | apr, may |
| Myrica gale | Myricaceae | sweetgale | freshwater | apr, may, jun |
| Nuphar polysepala | Nymphaeaceae | spatterdock, yellow pond lily | freshwater | may, jun, jul, aug |
| Plagiobothrys scouleri | Boraginaceae | Scouler's popcorn flower | western forest, eastern forest, prairie or bald, freshwater | may, jun, jul, aug |
| Poa macrantha | Poaceae | seashore bluegrass, sand-dune bluegrass | saltwater shores | apr, may, jun, jul |
| Polemonium carneum | Polemoniaceae | great polemonium, royal Jacob's-ladder, salmon polemonium | western forest | may, jun, jul |
| Populus trichocarpa | Salicaceae | black cottonwood, balsam poplar | western forest, eastern forest, shrub-steppe, freshwater | apr, may, jun |
| Potamogeton gramineus | Potamogetonaceae | variable-leaved pondweed, grassy pondweed | freshwater | jun, jul, aug |
| Ranunculus aquatilis var. diffusus | Ranunculaceae | water buttercup | ||
| Rhynchospora alba | Cyperaceae | white beaksedge, white beakrush | freshwater | jul, aug |
| Rosa pisocarpa | Rosaceae | clustered rose | western forest, freshwater | may, jun, jul |
| Sidalcea hendersonii | Malvaceae | Henderson's checker-mallow | freshwater, saltwater shores | jun, jul, aug |
| Solidago elongata | Asteraceae | West Coast or Cascade Canada goldenrod | ||
| Spergula arvensis * | Caryophyllaceae | corn spurry | disturbed areas | may |
| Spiraea douglasii var. menziesii | Rosaceae | Menzies' spirea | jun, jul, aug | |
| Tanacetum bipinnatum | Asteraceae | saltwater shores | may, jun, jul, aug, sep | |
| Teesdalia nudicaulis * | Brassicaceae | barestem teesdalia, shepherd's cress | disturbed areas | apr, may |
| Thermopsis montana var. ovata | Fabaceae | slender goldenbanner | ||
| Trifolium pratense * | Fabaceae | red clover | western forest, eastern forest, disturbed areas | jun, jul, aug |
| Viburnum edule | Adoxaceae | squashberry, high-bush cranberry | western forest, eastern forest, freshwater | may, jun, jul |
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.