Steamboat Rock, Grant County, WA.
List covers plants found on Steamboat Rock, south of Coulee Dam. Combined lists of Engvall and Pierce, 1954; E. Carlson, 1977; WNPS Central Washington Chapter field trips, May 1996 and May 1997; and WNPS Study Weekend, May 2002. 135 spp.
These lists represent the work of different WNPS members over the years.
Their accuracy has not been verified by the Washington Native Plant Society.
We offer these lists to individuals as a tool to enhance the enjoyment and study of native plants.
Vascular Plant List
Steamboat Rock
* - Introduced
Scientific Name Common Name Family Name
Achillea millifolium Yarrow Asteraceae
Agoseris heterophylla Annual agoseris Asteraceae
Agropyron spicatum Blue-bunch wheatgrass Poaceae
Allium geyeri Geyer's onion Liliaceae
Amelanchier alnifolia Serviceberry Rosaceae
Amsinckia retrorsa Rigid fiddleneck Boraginaceae
Antennaria dimorpha Low pussy-toes Asteraceae
Arabis cusickii Cusick's rockcress Brassicaceae
Arabis holboellii Holboell's rockcress Brassicaceae
Artemesia norvegica Mountain sagewort Asteraceae
Artemesia rigida Stiff sagebrush Asteraceae
Artemesia tridentata Big sagebrush Asteraceae
Artemesia tripartita Three-tip sagebrush Asteraceae
Astragalus purshii Pursh's milk-vetch Fabaceae
Astragalus spaldingii Spalding's milk vetch Fabaceae
Atriplex spinosa Spiny hop sage Chenopodiaceae
Balsamorhiza careyana Crey’s balsamroot Asteraceae
Balsamorhiza hookeri Hooker's balsamroot Asteraceae
Balsamorhiza sagittata Arrow-leaf balsamroot Asteraceae
Berberis aquifolium Tall Oregongrape Berberidaceae
Brodiaea douglasii Douglas' brodiaea Liliaceae
Bromus tectorum Cheat grass Poaceae
Calochortus macrocarpus Sagebrush mariposa Liliaceae
Castilleja thompsonii Thompson’s paintbrush Scrophulariaceae
Chaenactis douglasii Dusty maidens Asteraceae
Chrysothamnus nauseosus Gray rabbit-brush Asteraceae
Chrysothamnus viscidiflorus Green rabbit-brush Asteraceae
Clarkia pulchella Ragged Robin Onagraceae
Collinsia parviflora Small-flowered blue-eyed Mary Scrophulariaceae
Collomia linearis Narrow-leaf collomia Polemoniaceae
Collomia tenella Diffuse collomia Polemoniaceae
Commandra umbellata Bastard toad-flax Santalaceae
Cymopteris terebinthinus Turpentine spring-parsley Apiaceae
Cystopteris fragilis Fragile fern Polypodiaceae
Delphinium nuttallianum Upland larkspur Ranunculaceae
Descurainia pinnata Western tansymustard Brassicaceae Dodecatheon cusickii Cusick’s shooting star Primulaceae
Draba verna Spring whitlow-grass Brassicaceae
Elymus cinereus Giant rye grass Poaceae
Erigeron compositus Cut-leaved daisy Asteraceae
Erigeron linearis Desert yellow daisy Asteraceae
Erigeron poliospermus Cushion fleabane Asteraceae
Erigeron pumilus Shaggy fleabane Asteraceae
Eriogonum heracleoides Parsnip-flowered buckwheat Polygonaceae
Eriogonum niveum Snow buckwheat Polygonaceae
Eriogonum sphaerocephalum Rock buckwheat Polygonaceae
Eriogonum thymoides Thyme-leaf buckwheat Polygonaceae
Eriophyllum lanatum Oregon sunshine Asteraceae
Erodium cicutarium* Filaree Geraniaceae
Erysimum occidentale Pale wallflower Brassicaceae
Fritillaria pudica Yellow bell Liliaceae
Galium aparine Cleavers Rubiaceae
Geranium viscosissimum Sticky geranium Geraniaceae
Geum triflorum Prairie smoke Rosaceae
Halimolobos whitedii Whited's halimolobos Brassicaceae
Haplopappus resinosus Columbia goldenweed Asteraceae
Haplopappus stenophyllus Narrow-leaf goldenweed Asteraceae
Heuchera cylindrica Lava alumroot Saxifragaceae
Hydrophyllum capitatum Woolly breeches Hydrophyllaceae
Idahoa scapigera Scalepod Brassicaceae
Iris misouriensis Western blue flag Iridaceae
Lactuca serriola* Prickly lettuce Asteraceae
Leptodactylon pungens Prickly phlox Polemoniaceae
Lewisia rediviva Bitterroot Portulacaceae
Linaria dalmatica Dalmatian toad-flax Scrophulariaceae
Lithophragma bulbifera Slender prairie-star Saxifragaceae
Lithophragma parviflora Small-flowered prairie-star Saxifragaceae
Lithospermum ruderale Columbia puccoon Boraginaceae
Lomatium dissectum Fern-leaf biscuit-root Apiaceae
Lomatium geyeri Geyer's desert-parsley Apiaceae
Lomatium gormanii Gorman’s desert-parsley Apiaceae
Lomatium hambleniae Hamblen's desert-parsley Apiaceae
Lomatium macrocarpum Large-fruited lomatium Apiaceae
Lomatium triternatum Nine-leaf lomatium Apiaceae
Lupinus sulphureus Sulphur lupine Fabaceae
Machaeranthera canescens Hoary aster Asteraceae
Mentzelia albicaulis White-stemmed mentzelia Loasaceae
Mentzelia laevicaulis Blazingstar Loasaceae
Mertensia longiflora Small bluebells Boraginaceae
Microseris troximoides Wavyleaf microseris Asteraceae
Microsteris gracilis Pink microsteris Polemoniaceae
Montia perfoliata Miner's lettuce Portulacaceae
Myosotis laxa Small-flowered forget-me-not Boraginaceae
Myosotis micrantha* Blue forget-me-not Boraginaceae
Oenothera pallida White-stemmed eve. prim. Onagraceae
Opuntia polyacantha Prickly pear Cactaceae
Orobanche uniflora Naked broom-rape Orobanchaceae
Oryzopsis hymenoides Indian ricegrass Poaceae
Penstemon gairdneri Gairdner's penstemon Scrophulariaceae
Penstemon pruinosus Chelan penstemon Scrophulariaceae
Penstemon speciosus Showy penstemon Scrophulariaceae
Phacelia hastata White-leaf phacelia Hydrophyllaceae
Phacelia linearis Thread-leaf phacelia Hydrophyllaceae
Philadelphus lewisii Mock-orange Hydrangeaceae
Phlox caespitosa Tufted phlox Polemoniaceae
Phlox longifolia Long-leaf phlox Polemoniaceae
Plantago patagonica Candleweed Plantaginaceae
Plectritus macrocera White plectritus Valerianaceae
Poa sandbergii Sandberg's bluegrass Poaceae
Polemonium micranthum Littlebells polemonium Polemoniaceae
Polygonum douglasii Douglas' knotweed Polygonaceae
Potentilla glandulosa Sticky cinquefoil Rosaceae
Purshia tridentata Bitterbrush Rosaceae
Ranunculus glaberrimus Sagebrush buttercup Ranunculaceae
Ranunculus testiculatus* Hornseed buttercup Ranunculaceae
Rhus glabra Sumac Anacardiaceae
Rhus radicans Poison ivy Anacardiaceae
Ribes aureum Golden currant Grossulariaceae
Ribes cereum Wax currant Grossulariaceae
Rubus parviflorus Thimbleberry Rosaceae
Salsola kali* Russian thistle Chenopodiaceae
Salvia dorrii Gray ball sage Lamiaceae
Sarcobatus vermiculatus Greasewood Chenopodiaceae
Saxifraga integrifolia Grassland saxifrage Saxifragaceae
Selaginella densa Compact selaginella Selaginellaceae
Senecio integerrimus Western groundsel Asteraceae
Sisymbrium altissimum* Jim Hill mustard Brassicaceae
Sitanion hystrix Squirreltail Poaceae
Stephanomeria tenuifolia Bush wirelettuce Asteraceae
Stipa comata Rip-gut Poaceae
Talinum spinescens Spiny fameflower Portulacaceae
Taraxacum officinale* Dandelion Asteraceae
Tetradymia canescens Gray horse-brush Asteraceae
Thelopodium laciniatum Thick-leaved thelepody Brassicaceae
Tragopogon dubius* Oysterplant Asteraceae
Verbascum thapsus* Common mullein Scrophulariaceae
Viola trinervata Sagebrush violet Violaceae
Woodsia oregana Oregon woodsia Polypodiaceae
Wyethia amplexicaulis Northern mule's ears Asteraceae
Zigadenus venenosus Meadow death camas Liliaceae
Steamboat Rock, Grant County, Washington
WNPS Plant Lists
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