PlantQuest Species List for Columbia County, Washington

Scientific Name
(* = Introduced)		 Family Common Name Habitat Bloom Period
Allium acuminatum Amaryllidaceae taper-tip onion western forest; prairie or bald; shrub-steppe May, Jun, Jul
Ambrosia acanthicarpa Asteraceae flat spine bur-ragweed; annual bursage; bur ragweed shrub-steppe Jul, Aug, Sep, Oct
Asparagus officinalis * Asparagaceae asparagus freshwater; disturbed areas Jun, Jul, Aug
Astragalus cusickii Fabaceae Cusick's milk-vetch shrub-steppe May, Jun, Jul
Astragalus cusickii var. cusickii Fabaceae Cusick's milk-vetch May, Jun, Jul
Astragalus sheldonii Fabaceae Sheldon's milk-vetch eastern forest; shrub-steppe Apr, May, Jun
Calochortus eurycarpus Liliaceae big-pod mariposa lily; wide-fruited mariposa lily eastern forest; shrub-steppe Jun, Jul, Aug
Calochortus macrocarpus var. maculosus Liliaceae sagebrush mariposa
Celtis reticulata Cannabaceae netleaf hackberry eastern forest; shrub-steppe; freshwater Apr, May
Chorispora tenella * Brassicaceae crossflower; blue mustard eastern forest; shrub-steppe; disturbed areas Mar, Apr, May, Jun
Comandra umbellata ssp. pallida Santalaceae bastard toad flax
Cyperus strigosus Cyperaceae false flatsedge; straw-colored flatsedge freshwater; disturbed areas Jul, Aug, Sep, Oct
Erigeron corymbosus Asteraceae foothill fleabane; longleaf fleabane eastern forest; shrub-steppe Jun, Jul, Aug
Erigeron divergens Asteraceae eastern forest; shrub-steppe May, Jun, Jul
Euthamia occidentalis Asteraceae western goldenrod; western goldentop shrub-steppe; freshwater Jul, Aug, Sep, Oct
Helianthella uniflora var. douglasii Asteraceae Douglas helianthella; false sunflower May, Jun, Jul, Aug
Hesperostipa comata ssp. comata Poaceae needle and thread eastern forest; shrub-steppe May, Jun, Jul
Lepidium virginicum ssp. menziesii Brassicaceae coastal peppergrass; hairy peppergrass eastern forest; prairie or bald; shrub-steppe Apr, May, Jun
Lomatium rollinsii Apiaceae Rollins's desert-parsley; Rollins's biscuit-root shrub-steppe Apr
Lomatium serpentinum Apiaceae Snake Canyon desert-parsley; Snake Canyon biscuit-root eastern forest; shrub-steppe Apr, May, Jun, Jul
Lupinus sericeus var. asotinensis Fabaceae Asotin silk lupine
Marsilea vestita Marsileaceae hairy clover-fern; pepperwort; water-clover pepperwort freshwater [no flowers]
Morus alba * Moraceae white mulberry freshwater; disturbed areas Apr, May, Jun
Oenothera curtiflora * Onagraceae small-flowered gaura; velvet weed eastern forest; freshwater; disturbed areas Jun, Jul, Aug, Sep
Oenothera pallida Onagraceae pale evening-primrose eastern forest; shrub-steppe May, Jun, Jul
Parietaria pensylvanica Urticaceae Pennsylvania pellitory eastern forest; shrub-steppe; freshwater; disturbed areas May, Jun, Jul, Aug, Sep
Penstemon glandulosus var. glandulosus Plantaginaceae sticky-stem penstemon May, Jun, Jul
Penstemon triphyllus Plantaginaceae whorled beardtongue eastern forest; shrub-steppe May, Jun, Jul
Plantago patagonica Plantaginaceae woolly plantain eastern forest; prairie or bald; shrub-steppe Apr, May, Jun
Poa secunda ssp. juncifolia Poaceae alkali bluegrass; big bluegrass; Nevada bluegrass
Prunus mahaleb * Rosaceae mahaleb cherry; perfumed cherry western forest; eastern forest; shrub-steppe; disturbed areas May, Jun
Ribes niveum Grossulariaceae Snake River gooseberry; snow gooseberry eastern forest; freshwater Apr, May
Robinia pseudoacacia * Fabaceae black locust freshwater; disturbed areas May, Jun
Sedum leibergii Crassulaceae Leiberg's stonecrop shrub-steppe May, Jun, Jul
Sphaeralcea munroana Malvaceae Munro's globemallow; white-stemmed globemallow eastern forest; shrub-steppe May, Jun, Jul, Aug
Thelypodium milleflorum Brassicaceae many flowered thelypody eastern forest; shrub-steppe Apr, May, Jun, Jul
Trifolium repens * Fabaceae Dutch clover; white clover western forest; eastern forest; subalpine or alpine; prairie or bald; shrub-steppe; freshwater; disturbed areas May
Tripidium ravennae * Poaceae ravennagrass shrub-steppe; disturbed areas Jul, Aug, Sep
Veronica persica * Plantaginaceae bird-eye speedwell; Persian speedwell disturbed areas Mar, Apr, May
Viola nuttallii var. praemorsa Violaceae canary violet; upland yellow violet western forest; eastern forest; prairie or bald; shrub-steppe Apr, May, Jun, Jul

Generated on 2025-03-15.   Data from Consortium of PNW Herbaria and Burke Herbarium Image Collection.

More information on the PlantQuest Image Project can be found at https://burkeherbarium.org/imagecollection/plantquest.php.