| Scientific Name (* Introduced) |
Family | Common Name | Habitat | Bloom Period |
| Abronia latifolia | Nyctaginaceae | coastal sand verbena, yellow sand-verbena | saltwater shores | may, jun, jul, aug |
| Acmispon parviflorus | Fabaceae | short-flower bird's-foot-trefoil | western forest, prairie or bald, saltwater shores | apr, may, jun, jul, aug, sep |
| Alopecurus aequalis var. aequalis | Poaceae | shortawn fescue | ||
| Artemisia campestris var. scouleriana | Asteraceae | Scouler's wormwood, Pacific sagewort | ||
| Atriplex prostrata * | Amaranthaceae | triangle orache, hastate orache | saltwater shores, disturbed areas | jun, jul, aug, sep |
| Cakile maritima * | Brassicaceae | American sea-rocket | saltwater shores | may, jun, jul, aug, sep, may |
| Calandrinia ciliata | Montiaceae | fringed redmaids | western forest, prairie or bald | apr, may |
| Carex tumulicola | Cyperaceae | foothill sedge, split-awn sedge | may | |
| Cotoneaster horizontalis * | Rosaceae | wall or rockspray cotoneaster, rock cotoneaster | western forest, prairie or bald, disturbed areas | may, jun |
| Crataegus douglasii | Rosaceae | black hawthorn, Douglas' hawthorn | western forest, eastern forest, shrub-steppe, freshwater | may, jun |
| Crocidium multicaule | Asteraceae | common spring-gold, gold star | eastern forest, prairie or bald, shrub-steppe, disturbed areas | mar, apr, may, jun, nov-feb |
| Cynosurus echinatus * | Poaceae | bristly dog's-tail grass | disturbed areas | may, jun, jul |
| Deschampsia cespitosa | Poaceae | Beringian hairgrass | subalpine or alpine | jun, jul, aug, sep |
| Eriophorum virginicum * | Cyperaceae | tawny cottongrass | freshwater | jul, aug |
| Fallopia sachalinensis * | Polygonaceae | |||
| Gamochaeta ustulata | Asteraceae | purple cudweed, spoon-leaved purple everlasting | disturbed areas | apr, may, jun, jul, aug, sep, oct |
| Geranium lucidum * | Geraniaceae | shining crane's-bill | western forest, disturbed areas | apr, may, jun |
| Hornungia procumbens | Brassicaceae | prostrate hutchinsia, ovalpurse | prairie or bald, shrub-steppe, freshwater | mar, apr, may, jun |
| Lemna turionifera | Araceae | common duckweed, lesser duckweed, water lentil | freshwater | jun, jul, aug, sep, oct |
| Lonicera hispidula | Caprifoliaceae | pink honeysuckle | western forest, prairie or bald | jun, jul, aug |
| Lupinus bicolor | Fabaceae | two-color lupine | prairie or bald, shrub-steppe | apr, may, jun, jul |
| Montia howellii | Montiaceae | Howell's miner's-lettuce, Howell's montia | western forest | apr, may |
| Olsynium douglasii | Iridaceae | Douglas' grass-widow, purple-eyed grass | eastern forest, prairie or bald, shrub-steppe | mar, apr, may, jun |
| Plagiobothrys scouleri | Boraginaceae | Scouler's popcorn flower | western forest, eastern forest, prairie or bald, freshwater | may, jun, jul, aug |
| Ranunculus californicus | Ranunculaceae | prairie or bald | apr, may, jun | |
| Rumex salicifolius var. transitorius | Polygonaceae | |||
| Sagina apetala * | Caryophyllaceae | annual pearlwort | disturbed areas | may, jun |
| Sagina maxima ssp. crassicaulis | Caryophyllaceae | Stick-stemmed pearlwort | jun, jul, aug, sep | |
| Sagina maxima ssp. maxima | Caryophyllaceae | |||
| Sanicula crassicaulis var. crassicaulis | Apiaceae | Pacific sanicle | may, jun | |
| Sanicula crassicaulis var. tripartita | Apiaceae | Pacific sanicle | may, jun | |
| Sarracenia flava * | Sarraceniaceae | yellow pitcherplant | freshwater | |
| Sarracenia purpurea * | Sarraceniaceae | purple pitcher plant, northern pitcher plant | freshwater | |
| Scutellaria galericulata | Lamiaceae | marsh skullcap, Hooded skullcap | western forest, eastern forest, shrub-steppe, freshwater | jun, jul, aug |
| Sedum stenopetalum | Crassulaceae | eastern forest, shrub-steppe, subalpine or alpine | may, jun, jul | |
| Soliva sessilis * | Asteraceae | field burrweed, lawn burweed | disturbed areas | mar, apr, may, jun |
| Sorbus intermedia * | Rosaceae | Swedish whitebeam | ||
| Spergularia macrotheca | Caryophyllaceae | sticky sandspurry, beach sandspurry | prairie or bald, saltwater shores | jun, jul, aug, sep |
| Spergularia macrotheca var. macrotheca | Caryophyllaceae | beach sandspurry | prairie or bald, saltwater shores | jun, jul, aug, sep |
| Stellaria pallida * | Caryophyllaceae | lesser chickweed |
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.