PlantQuest Species List for Whitman County, Washington

Scientific Name
(* = Introduced)		 Family Common Name Habitat Bloom Period
Abronia mellifera Nyctaginaceae honey-scented sandverbena; white sand verbena shrub-steppe May, Jun, Jul, Aug, Sep, Oct
Acer saccharinum * Sapindaceae silver maple freshwater; disturbed areas Mar, Apr
Achnatherum hymenoides Poaceae Indian ricegrass shrub-steppe May, Jun
Allium columbianum Amaryllidaceae Columbia onion eastern forest May, Jun
Astragalus sclerocarpus Fabaceae stalked-pod milk-vetch; The Dalles milk-vetch; woody-pod milk-vetch eastern forest; shrub-steppe May, Jun
Atriplex heterosperma * Amaranthaceae orache; Russian atriplex orache shrub-steppe; freshwater; disturbed areas Jun, Jul, Aug
Bolboschoenus maritimus ssp. paludosus Cyperaceae saltmarsh bulrush; seacoast bulrush
Brickellia grandiflora Asteraceae tasselflower brickellbush; large flowered tasselflower; large flowered thoroughwort eastern forest; shrub-steppe Jul, Aug, Sep, Oct
Castilleja thompsonii Orobanchaceae Thompson's paintbrush eastern forest; subalpine or alpine; shrub-steppe May, Jun, Jul, Aug, Sep
Chrysothamnus viscidiflorus ssp. lanceolatus Asteraceae sticky-leaf rabbitbrush; yellow rabbitbrush Jul, Aug, Sep
Erigeron filifolius Asteraceae Peck's threadleaf fleabane; threadleaf fleabane eastern forest; shrub-steppe May, Jun, Jul, Aug
Erigeron piperianus Asteraceae Piper's fleabane shrub-steppe May, Jun
Eriogonum thymoides Polygonaceae thyme buckwheat; thyme-leaf wild buckwheat eastern forest; shrub-steppe Apr, May, Jun
Hackelia ciliata Boraginaceae Okanogan stickseed eastern forest; shrub-steppe May, Jun
Heliotropium curassavicum Heliotropiaceae salt heliotrope; seaside heliotrope shrub-steppe Jun, Jul, Aug, Sep
Hymenopappus filifolius var. filifolius Asteraceae Columbia cutleaf shrub-steppe May, Jun, Jul, Aug, Sep, Oct
Isoetes howellii Isoetaceae Howell's quillwort freshwater [no flowers]
Juncus uncialis Juncaceae inch-high rush freshwater May, Jun
Lemna trisulca Araceae ivy duckweed; ivy-leaved duckweed; star duckweed freshwater Jun, Jul, Aug, Sep
Limosella aquatica Scrophulariaceae awl-leaf mudwort shrub-steppe; freshwater Jun, Jul, Aug, Sep, Oct
Lupinus lepidus var. aridus Fabaceae prairie lupine
Microgilia minutiflora Polemoniaceae small-flowered gilia; small-flower skyrocket eastern forest; shrub-steppe Apr, May, Jun
Myriophyllum spicatum * Haloragaceae spiked water milfoil freshwater Apr, May, Jun, Jul, Aug, Sep, Oct
Navarretia leucocephala ssp. minima Polemoniaceae least navarretia May, Jun, Jul
Oreocarya glomerata Boraginaceae cockscomb oreocarya eastern forest; shrub-steppe Apr, May, Jun, Jul
Oreocarya spiculifera Boraginaceae Snake River oreocarya; Snake River cat's-eye subalpine or alpine; shrub-steppe May, Jun, Jul
Pectocarya penicillata Boraginaceae shortleaf combseed; winged pectocarya eastern forest; shrub-steppe Apr, May, Jun
Phlox caespitosa Polemoniaceae clumped phlox; clustered phlox; stiff phlox; tufted phlox eastern forest; shrub-steppe Apr, May, Jun
Phragmites australis ssp. australis * Poaceae common reed
Polygonum polygaloides ssp. polygaloides Polygonaceae white-margined knotwee; pokeweed fleeceflower
Potamogeton nodosus Potamogetonaceae loddon's pondweed; long-leaved pondweed freshwater Jun, Jul, Aug
Psilocarphus oregonus Asteraceae Oregon woollyheads eastern forest; shrub-steppe Mar, Apr, May, Jun, Jul, Aug
Puccinellia distans * Poaceae European alkaligrass; weeping alkaligrass freshwater; disturbed areas Jun, Jul, Aug
Salvia dorrii var. incana Lamiaceae fleshy sage; gray-ball sage
Schoenoplectus saximontanus Cyperaceae Rocky Mountain bulrush freshwater Jun, Jul, Aug
Teucrium canadense var. occidentale Lamiaceae Canada germander Jun, Jul, Aug
Townsendia florifera Asteraceae showy Townsend daisy; showy townsendia shrub-steppe May, Jun, Jul
Triglochin maritima Juncaginaceae seaside arrow-grass freshwater; saltwater shores May, Jun, Jul, Aug
Veronica catenata Plantaginaceae chain speedwell freshwater Jun, Jul, Aug
Viola glabella Violaceae pioneer violet; stream violet western forest; eastern forest; freshwater Mar, 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.