| Scientific Name (* Introduced) |
Family | Common Name | Habitat | Bloom Period |
| Ailanthus altissima * | Simaroubaceae | tree-of-heaven | eastern forest, shrub-steppe, disturbed areas | may, jun, jul |
| Anthriscus caucalis * | Apiaceae | burr chervil | disturbed areas | may |
| Aphyllon franciscanum | Orobanchaceae | |||
| Artemisia campestris var. scouleriana | Asteraceae | Scouler's wormwood, Pacific sagewort | ||
| Aspidotis densa | Pteridaceae | Indian's dream, Oregon cliff brake, podfern | western forest, eastern forest, subalpine or alpine | no flowers |
| Calochortus macrocarpus var. macrocarpus | Liliaceae | sagebrush mariposa | ||
| Camassia quamash ssp. maxima | Asparagaceae | Common camas | apr, may, jun | |
| Cardamine hirsuta * | Brassicaceae | hairy bittercress | western forest, eastern forest, prairie or bald, disturbed areas | mar, apr, may, jun |
| Cardamine oligosperma | Brassicaceae | little western bittercress, Siberian or umbellate bittercress, Little western bittercress | western forest, eastern forest, freshwater | mar, apr, may, jun, jul, aug, sep, mar, apr, may, jun, jul |
| Carex nebrascensis | Cyperaceae | Nebraska sedge | freshwater | may |
| Ceanothus integerrimus | Rhamnaceae | deerbrush | eastern forest | may, jun, jul |
| Celtis reticulata | Cannabaceae | netleaf hackberry | eastern forest, shrub-steppe, freshwater | apr, may |
| Collinsia rattanii | Plantaginaceae | sticky blue eyed Mary, rattan collinsia | western forest, eastern forest | apr, may, jun |
| Cryptantha intermedia var. hendersonii | Boraginaceae | |||
| Cynoglossum officinale * | Boraginaceae | gypsy-flower, hound's tongue, common hound's tongue | eastern forest, disturbed areas | may, jun, jul |
| Douglasia nivalis | Primulaceae | snow dwarf-primrose, snow douglasia | shrub-steppe, subalpine or alpine | apr, may, jun, jul, aug |
| Elyleymus aristatus | Poaceae | |||
| Epilobium campestre | Onagraceae | smooth willowherb | ||
| Epilobium densiflorum | Onagraceae | dense-flower willowherb | western forest, eastern forest, shrub-steppe, freshwater | jul, aug, sep |
| Eschscholzia californica * | Papaveraceae | California poppy | prairie or bald, disturbed areas | may, jun, jul, aug, sep |
| Hordeum marinum ssp. gussoneanum * | Poaceae | |||
| Lepidium campestre * | Brassicaceae | field pepperweed, field peppergrass or pepperwort, field cress | disturbed areas | may, jun, jul |
| Lewisia rediviva var. rediviva | Montiaceae | bitterroot | ||
| Lomatium cuspidatum | Apiaceae | Wenatchee desert-parsley, Wenatchee Mountain lomatium | eastern forest, subalpine or alpine | may, jun, jul |
| Lomatium suksdorfii | Apiaceae | Suksdorf's desert-parsley | shrub-steppe | apr, may |
| Lomatium tamanitchii | Apiaceae | |||
| Lupinus bicolor | Fabaceae | two-color lupine | prairie or bald, shrub-steppe | apr, may, jun, jul |
| Madia citriodora | Asteraceae | lemon-scented madia, lemon tarweed, lemon scented tarplant | eastern forest, shrub-steppe | may, jun |
| Myosotis stricta * | Boraginaceae | strict forget-me-not, blue scorpiongrass | shrub-steppe, freshwater, disturbed areas | apr, may, jun |
| Nemophila pedunculata | Hydrophyllaceae | little-foot nemophila, meadow baby-blue-eyes, spreading nemophila | western forest, freshwater | apr, may, jun |
| Oreocarya glomerata | Boraginaceae | |||
| Papaver argemone * | Papaveraceae | long prickly-head poppy | disturbed areas | may |
| Penstemon barrettiae | Plantaginaceae | Barrett's penstemon, Barrett's beardtongue | eastern forest, shrub-steppe | apr, may |
| Plectritis brachystemon | Valerianaceae | shortspur sea blush | western forest, prairie or bald | apr, may, jun |
| Poa leibergii | Poaceae | Leiberg's bluegrass | may | |
| Polygonum polygaloides ssp. confertiflorum | Polygonaceae | close-flowered knotweed | may, jun, jul | |
| Polystichum lemmonii | Dryopteridaceae | Lemmon's holly-fern, Shasta fern | western forest, eastern forest | no flowers |
| Potamogeton richardsonii | Potamogetonaceae | Richardson's pondweed, clasping-leaved pondweed | freshwater | jun, jul, aug |
| Rorippa curvipes | Brassicaceae | blunt-leaved yellowcress | freshwater | may, jun, jul, aug, sep |
| Salix lasiandra var. lasiandra | Salicaceae | Pacific willow | ||
| Trifolium willdenovii | Fabaceae | tomcat clover, springbank clover | western forest, prairie or bald | apr, 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.