Scientific Name

Common Name

Abies amabilis

Pacific silver fir

Abies grandis

Grand fir

Abies lasiocarpa

Sub-alpine fir

Abies procera

Noble fir

Abronia latifolia

Yellow sand verbena

Acer circinatum

Vine maple

Acer glabrum

Douglas maple

Acer macrophyllum

Big-leaf maple

Achillea millefolium

Yarrow

Achlys triphylla

Vanilla leaf

Actaea rubra

Baneberry

Adenocaulon bicolor

Pathfinder

Adiantum pedatum

Maidenhair fern

Agoseris aurantiaca

Orange agoseris

Agoseris grandiflora

Large-flowered agoseris

Agropyron caninum

Bearded wheatgrass

Agrostis aequivalvis

Alaska bentgrass

Agrostis microphylla

Small-leaved bentgrass

Agrostis oregonensis

Oregon bentgrass

Agrostis pallens

Dune bentgrass

Agrostis scabra

Tickle-grass

Agrostis stolonifera

Colonian bentgrass

Agrostis thurberiana

Thurber bentgrass

Agrostis variabilis

Variable bentgrass

Alchemilla occidentalis

Western lady's-mantle

Alisma plantago-aquatica

American waterplantain

Allium acuminatum

Taper-tip onion

Allium cernuum

Nodding onion

Allotropa virgata

Candystick

Alnus rubra

Red alder

Alnus sinuata

Sitka alder

Alopecurus aequalis

Short-awned foxtail

Alopecurus geniculatus

Water foxtail

Amaranthus blitoides

Prostrate pigweed

Ambrosia artemisiifolia

Annual ragweed

Ambrosia chamissonis

Silver bursage

Amelanchier alnifolia

Serviceberry

Amsinckia intermedia

Fireweed fiddleneck

Amsinckia lycopsoides

Bugloss fiddleneck

Amsinckia menziesii

Menzies' fiddleneck

Anemone deltoidea

Columbia windflower

Anemone oregana

Oregon anemone

Angelica arguta

Sharp-tooth angelica

Angelica genuflexa

Kneeling angelica

Angelica lucida

Sea-watch

Antennaria microphylla

Rosy pussy-toes

Antennaria neglecta

Field pussy-toes

Antennaria racemosa

Raceme pussy-toes

Apocynum androsaemifolium

Spreading dogbane

Apocynum medium

Western dogbane

Aquilegia formosa

Red columbine

Arabis drummondii

Drummond's rockcress

Arabis furcata

Forkhaired rockcress

Arabis glabra

Tower mustard

Arabis hirsuta

Hairy rockcress

Arabis holboellii

Holboell's rockcress

Arabis lemmonii

Lemmon's rockcress

Arbutus menziesii

Pacific madrone

Arceuthobium campylopodum

Western dwarf mistletoe

Arceuthobium tsugense

Hemlock dwarf mistletoe

Arctostaphylos columbiana

Bristly manzanita

Arctostaphylos nevadensis

Kinnikinnik

Arctostaphylos uva-ursi

Bearberry

Arenaria capillaris

Thread-leaved sandwort

Arenaria macrophylla

Big-leaf sandwort

Arenaria paludicola

Swamp sandwort

Arenaria stricta

Slender sandwort

Armeria maritima

Sea thrift

Arnica amplexicaulis

Streambank arnica

Arnica chamissonis

Meadow arnica

Arnica latifolia

Mountain arnica

Arnica mollis

Hairy arnica

Arnica parryi

Nodding arnica

Artemisia biennis

Biennial wormwood

Artemisia ludoviciana

Western mugwort

Artemisia suksdorfii

Suksdorf's sagewort

Aruncus sylvester

Goatsbeard

Asarum caudatum

Wild ginger

Aspidotus densa

Indian's dream fern

Asplenium trichomanes

Maidenhair spleenwort

Aster chilensis

Long-leaf aster

Aster curtus

White-topped aster

Aster foliaceus

Leafy aster

Aster frondosus

Alkali aster

Aster modestus

Great northern aster

Aster occidentalis

Western aster

Aster subspicatus

Douglas' aster

Athyrium distentifolium

Alpine lady fern

Athyrium filix-femina

Lady fern

Atriplex patula

Orache

Azolla filiculoides

Pacific water-fern

Azolla mexicana

Mexican water-fern

Barbarea orthoceras

American wintercress

Barbarea verna

Early wintercress

Berberis aquifolium

Tall Oregongrape

Berberis nervosa

Cascade Oregongrape

Berberis repens

Creeping Oregongrape

Betula glandulosa

Bog birch

Betula occidentalis

Water birch

Betula papyrifera

Paper birch

Bidens cernua

Nodding beggar-ticks

Bidens frondosa

Leafy beggar-ticks

Blechnum spicant

Deer fern

Boisduvalia densiflora

Dense spike-primrose

Boisduvalia stricta

Brook spike-primrose

Boschniakia hookeri

Vancouver groundcone

Botrychium lanceolatum

Triangle moonwort

Botrychium lunaria

Common moonwort

Botrychium minganense

Mingan moonwort

Botrychium montanum

Mountain moonwort

Botrychium multifidum

Leathery grape-fern

Botrychium pedunculosum

Stalked moonwort

Botrychium pinnatum

Northern grape-fern

Boykinia elata

Coast boykinia

Boykinia major

Sierra boykinia

Brasenia schreberi

Water-shield

Brodiaea congesta

Ookow

Brodiaea coronaria

Harvest brodiaea

Brodiaea hyacinthina

Hyacinth brodiaea

Bromus carinatus

California brome

Bromus ciliatus

Fringed brome

Bromus sitchensis

Alaska brome

Cakile edentula

Searocket

Calamagrostis canadensis

Bluejoint

Calamagrostis sequiflora

1 &1/2 flowered reedgrass

Calandrinia ciliata

Red maids

Callitriche heterophylla

Different-leaved water-starwort

Callitriche verna

Spring water-starwort

Calochortus tolmiei

Tolmie's mariposa

Caltha biflora

White marshmarigold

Caltha leptosepala

Elkslip

Calypso bulbosa

Fairy slipper

Camassia leichtlinii

Great camas

Camassia quamash

Common camas

Campanula lasiocarpa

Alaska harebell

Campanula rotundifolia

Common harebell

Campanula scouleri

Scouler's harebell

Cardamine breweri

Brewer's bittercress

Cardamine occidentalis

Western bittercress

Cardamine oligosperma

Little Western bittercress

Cardamine pensylvanica

Pennsylvania bittercress

Cardamine pulcherrima

Spring beauty

Carex amplifolia

Big-leaf sedge

Carex aperta

Columbia sedge

Carex aquatilis

Water sedge

Carex arcta

Northern clustered sedge

Carex athrostachya

Slender-beak sedge

Carex bebbii

Bebb's sedge

Carex bolanderi

Bolander's sedge

Carex brunnescens

Brown sedge

Carex buxbaumii

Buxbaum's sedge

Carex californica

California sedge

Carex canescens

Silvery sedge

Carex comosa

Bristly sedge

Carex crawfordii

Crawford's sedge

Carex cusickii

Cusick's sedge

Carex deweyana

Dewey's sedge

Carex diandra

Lesser panicled sedge

Carex echinata

Muricate sedge

Carex hendersonii

Henderson's sedge

Carex illota

Sheep sedge

Carex inops

Long-stoloned sedge

Carex interior

Inland sedge

Carex laeviculmis

Smooth-stemmed sedge

Carex lasiocarpa

Slender sedge

Carex lenticularis

Lenticular sedge

Carex leporina

Hare sedge

Carex leptalea

Bristle-stalked sedge

Carex limosa

Shore sedge

Carex livida

Pale sedge

Carex luzulina

Woodrush sedge

Carex lyngbyei

Lingby's sedge

Carex macrocephala

Dune sedge

Carex mertensii

Merten's sedge

Carex microptera

Small-winged sedge

Carex nigricans

Black alpine sedge

Carex obnupta

Slough sedge

Carex ovalis

Eggbract sedge

Carex pachystachya

Pachystachy sedge

Carex pauciflora

Few-flowered sedge

Carex pellita

Woolly sedge

Carex phyllomanica

Coastal stellate sedge

Carex podocarpa

Sedge

Carex preslii

Presl's sedge

Carex projecta

Necklace sedge

Carex retrorsa

Knot-leaf sedge

Carex rossii

Ross' sedge

Carex rostrata

Beaked sedge

Carex saxatilis

Russet sedge

Carex scirpoidea

Single spike sedge

Carex scoparia

Pointed broom sedge

Carex scopulorum

Rocky Mtn. sedge

Carex spectabilis

Showy sedge

Carex stipata

Sawbeak sedge

Carex stylosa

Long-styled sedge

Carex tumulicola

Foothill sedge

Carex utriculata

Beaked sedge

Carex vesicaria

Inflated sedge

Carex viridula

Green sedge

Carex vulpinoidea

Fox sedge

Cassiope lycopodioides

Clubmoss moss-heather

Cassiope mertensiana

White mountain heather

Castilleja hispida

Harsh paintbrush

Castilleja levisecta

Golden indian-paintbrush

Castilleja miniata

Scarlet paintbrush

Castilleja tenuis

Hairy Indian paintbrush

Ceanothus sanguineus

Redstem ceanothus

Ceanothus velutinus

Snowbrush

Cerastium arvense

Field chickweed

Ceratophyllum demersum

Hornwort

Ceratophyllum echinatum

Thornwort

Chamaecyparis nookatensis

Alaska cedar

Cheilanthes gracillima

Lace fern

Chimaphila menziesii

Little pipsissewa

Chimaphila umbellata

Pipsissewa

Cicuta douglasii

Water-hemlock

Cimicifuga elata

Tall bugbane

Cinna latifolia

Reedgrass

Circaea alpina

Enchanter's nightshade

Cirsium brevistylum

Indian thistle

Cirsium callilepsis

Mountain thistle

Cirsium edule

Horse thistle

Cirsium remotifolium

Weak thistle

Cladothamnus pyroliflorus

Copperbush

Clarkia amoena

Farwell-to-spring

Claytonia lanceolata

Western spring beauty

Claytonia rubra

Red miner's lettuce

Claytonia washingtoniana

Hybrid miner's lettuce

Clintonia uniflora

Queen's cup

Collinsia parviflora

Small-flowered blue-eyed Mary

Collomia grandiflora

Large-flowered collomia

Collomia heterophylla

Varied-leaf collomia

Collomia linearis

Narrow-leaf collomia

Conioselinum pacificum

Pacific hemlock-parsley

Coptis asplenifolia

Spleenwort-leaved goldthread

Corallorhiza maculata

Spotted coral-root

Corallorhiza mertensiana

Western coral-root

Corallorhiza striata

Striped coral-root

Cornus canadensis

Bunchberry

Cornus nuttallii

Pacific dogwood

Cornus stolonifera

Red-osier dogwood

Corydalis scouleri

Western corydalis

Corylus cornuta

Hazelnut

Crataegus douglasii

Black hawthorn

Cryptantha torreyana

Torrey's cryptantha

Cryptogramma cascadensis

Cascade parsley fern

Cryptogramma crispa

Parsley fern

Cuscuta salina

Saltmarsh dodder

Cyperus bipartitus

Shining flatsedge

Cyperus erythrorhizos

Red-root flatsedge

Cystopteris fragilis

Fragile fern

Danthonia intermedia

Timber oatgrass

Danthonia spicata

Poverty danthonia

Daucus pusillus

American carrot

Delphinium menziesii

Mountain larkspur

Delphinium trolliifolium

Columbia larkspur

Deschampsia atropurpurea

Mountain hairgrass

Deschampsia caespitosa

Tufted hairgrass

Deschampsia elongata

Slender hairgrass

Dicentra formosa

Bleeding heart

Disporum hookeri

Hooker fairy-bell

Disporum smithii

Smith fairy-bell

Distichlis spicata

Seashore salt grass

Dodecatheon jeffreyi

Jeffrey's shooting star

Dodecatheon pulchellum

Few-flowered shooting star

Draba aureola

Alpine draba

Draba stenoloba

Slender draba

Draba verna

Spring whitlow-grass

Dracocephalum parviflorum

American dragonhead

Drosera anglica

Great sundew

Drosera rotundifolia

Round-leaf sundew

Dryopteris carthusiana

Wood-fern

Dryopteris expansa

Spreading wood-fern

Dulichium arundinaceum

Dulichium

Eburophyton austiniae

Phantom orchid

Eleocharis acicularis

Needle spike-rush

Eleocharis ovata

Ovoid spike-rush

Eleocharis palustris

Common spike-rush

Eleocharis parvula

Small spike-rush

Elodea canadensis

Canadian waterweed

Elodea nuttallii

Nuttall's waterweed

Elymus canadensis

Nodding wildrye

Elymus glaucus

Western ryegrass

Elymus hirsutus

Hairy ryegrass

Elymus mollis

American dunegrass

Empetrum nigrum

Crowberry

Epilobium alpinum

Alpine willow-herb

Epilobium angustifolium

Fireweed

Epilobium foliosum

Willowherb

Epilobium glandulosum

Common willow-herb

Epilobium halleanum

Hall's willowherb

Epilobium luteum

Yellow willow-herb

Epilobium minutum

Small-flowered willow-herb

Epilobium paniculatum

Tall annual willow-herb

Epilobium watsonii

Watson's willow-herb

Epipactis gigantea

Giant helleborine

Equisetum arvense

Common horsetail

Equisetum fluviatale

Swamp horsetail

Equisetum hyemale

Scouring rush

Equisetum laevigatum

Smooth scouring-rush

Equisetum palustre

Marsh horsetail

Equisetum telmateia

Giant horsetail

Erigeron acris

Bitter fleabane

Erigeron annuus

Annual fleabane

Erigeron aureus

Golden fleabane

Erigeron peregrinus

Subalpine daisy

Erigeron philadelphicus

Philadelphia daisy

Erigeron strigosus

Daisy fleabane

Eriophorum chamissonis

Chamisso's cottongrass

Eriophorum gracile

Slender cottongrass

Eriophorum polystachion

Narrow-leaved cottongrass

Eriophyllum lanatum

Oregon sunshine

Erythronium grandiflorum

Glacier lily

Erythronium oregonum

Giant fawn-lily

Euphorbia spathulata

Spatulate-leaf spurge

Fauria crista-galli

Deer-cabbage

Festuca idahoensis

Blue bunchgrass

Festuca occidentalis

Western fescue

Festuca octoflora

Slender fescue

Festuca ovina

Sheep fescue

Festuca rubra

Red fescue

Festuca subulata

Bearded fescue

Festuca subuliflora

Crinkle-awn fescue

Fragaria vesca

Wild strawberry

Fragaria virginiana

Woods strawberry

Fraxinus latifolia

Oregon ash

Fritillaria camschatcensis

Black lily

Fritillaria lanceolata

Chocolate lily

Galium aparine

Cleavers

Galium boreale

Northern bedstraw

Galium kamtschaticum

Boreal bedstraw

Galium oreganum

Oregon bedstraw

Galium trifidum

Small bedstraw

Galium triflorum

Fragrant bedstraw

Gaultheria hispidula

Creeping wintergreen

Gaultheria humifusa

Alpine wintergreen

Gaultheria ovatifolia

Slender wintergreen

Gaultheria shallon

Salal

Gentiana calycosa

Mountain bog gentian

Gentiana douglasiana

Swamp gentian

Gentiana sceptrum

King's gentian

Geranium bicknellii

Bicknell's geranium

Geranium carolinianum

Wild geranium

Geum macrophyllum

Large-leaved avens

Gilia capitata

Globe gilia

Glaux maritima

Sea milkwort

Glehnia leiocarpa

American glehnia

Glyceria borealis

Northern mannagass

Glyceria grandis

Reed mannagrss

Glyceria leptostachya

Davy mannagrass

Glyceria occidentalis

Western mannagrass

Glyceria striata

Fowl mannagrass

Gnaphalium chilense

Cottonbatting cudweed

Gnaphalium microcephalum

Slender cudweed

Gnaphalium palustre

Lowland cudweed

Gnaphalium purpureum

Purple cudweed

Goodyera oblongifolia

Rattlesnake-plantain

Gratiola ebracteata

Hedge hyssop

Grindelia integrifolia

Coastal gumweed

Grindelia stricta

Oregon gumweed

Gymnocarpium dryopteris

Oak fern

Habenaria dilatata

White bog-orchid

Habenaria elegans

Elegant rein-orchid

Habenaria hyperborea

Northern green bog-orchid

Habenaria obtusata

Small northern bog-orchid

Habenaria orbiculata

Round-leaved rein-orchid

Habenaria saccata

Slender bog-orchid

Habenaria unalascensis

Alaska rein-orchid

Haplopappus hirtus

Hairy goldenweed

Hemitomes congestum

Gnome-plant

Heracleum lanatum

Cow parsnip

Heuchera chlorantha

Meadow alumroot

Heuchera glabra

Smooth alumroot

Heuchera micrantha

Small-flowered alumroot

Hieracium albiflorum

White-flowered hawkweed

Hieracium gracile

Slender hawkweed

Hippuris montana

Mountain mare's-tail

Hippuris vulgaris

Mare's tail

Holodiscus discolor

Ocean spray

Honkenya peploides

Sea purslane

Hordeum brachyantherum

Meadow barley

Hordeum jubatum

Foxtail barley

Hydrocotyle ranunculoides

Marsh penny-wort

Hydrophyllum fendleri

Fendler's waterleaf

Hydrophyllum tenuipes

Pacific waterleaf

Hypericum anagalloides

Bog St. John's-wort

Hypericum formosum

Western St.John's-wort

Hypericum scouleri

Scouler's St. John's-wort

Hypopites monotropa

Many-flowered indian pipe

Isoetes echniospora

Spiny-spored quillwort

Isoetes lacustris

Lake quillwort

Jaumea carnosa

Fleshy jaumea

Juncus acuminatus

Tapered rush

Juncus articulatus

Jointed rush

Juncus balticus

Baltic rush

Juncus bolanderi

Bolander's rush

Juncus covillei

Coville's rush

Juncus drummondii

Drummond's rush

Juncus effusus

Soft rush

Juncus ensifolius

Daggerleaf rush

Juncus filiformis

Thread rush

Juncus gerardii

Mud rush

Juncus mertensianus

Merten's rush

Juncus oxymeris

Pointed rush

Juncus parryi

Parry's rush

Juncus supiniformis

Spreading rush

Juncus tenuis

Slender rush

Juniperus communis

Mountain juniper

Kalmia microphylla

Alpine laurel

Kalmia occidentalis

Western swamp laurel

Lathyrus japonicus

Maritime peavine

Lathyrus lanszwertii

Thick-leaved peavine

Lathyrus nevadensis

Nuttall's peavine

Lathyrus palustris

Marsh peavine

Lathyrus polyphyllus

Leafy peavine

Lathyrus vestitus

Pacific pea

Ledum glandulosum

Trapper's tea

Ledum groenlandicum

Labrador tea

Leersia oryzoides

Cutgrass

Lemna minor

Common duckweed

Lemna trisulca

Star duckweed

Lemna turionifera

Turion duckweed

Leptarrhena pyrolifolia

Leatherleaf saxifrage

Ligusticum apiifolium

Western lovage

Lilaeopsis occidentalis

Lilaeopsis

Lilium columbianum

Tiger lily

Linanthastrum nuttallii

Linanthastrum

Lindernia dubia

Yellow-seed false-pimpernel

Linnaea borealis

Twinflower

Linum perenne

Wild blue-flax

Listera borealis

Northern twayblade

Listera caurina

Northwestern twayblade

Listera convallarioides

Broad-lipped twayblade

Listera cordata

Heart-leaved twayblade

Lithophragma parviflorum

Small-flowered prairie-star

Lobelia dortmanna

Water lobelia

Lomatium martindalei

Few-flowered lomatium

Lomatium nudicaule

Pestle parsnip

Lonicera ciliosa

Orange honeysuckle

Lonicera hispidula

California honeysuckle

Lonicera involucrata

Black twinberry

Lotus denticulatus

Meadow lotus

Lotus micranthus

Miniature lotus

Lotus pinnatus

Meadow deervetch

Lotus unifoliolatus

Spanish clover

Ludwigia palustris

False loosestrife

Luetkea pectinata

Partridge foot

Luina hypoleuca

Silverback luina

Lupinus albicaulis

Sickle-keeled lupine

Lupinus arboreus

Tree lupine

Lupinus bicolor

Two-color lupine

Lupinus latifolius

Broad-leaf lupine

Lupinus lepidus

Prairie lupine

Lupinus littoralis

Seashore lupine

Lupinus polycarpus

Field lupine

Lupinus polyphyllus

Big-leaf lupine

Lupinus rivularis

Streambank lupine

Lupinus wyethii

Wyeth's lupine

Luzula campestris

Field woodrush

Luzula comosa

Congensed woodrush

Luzula parviflora

Small-flowered woodrush

Lycopodium annotinum

Stiff clubmoss

Lycopodium clavatum

Running clubmoss

Lycopodium complanatum

Ground cedar

Lycopodium haleakalae

Clubmoss

Lycopodium inundatum

Bog clubmoss

Lycopodium obscurum

Groundpine

Lycopodium selago

Fir clubmoss

Lycopodium sitchense

Alaska clubmoss

Lycopus americanus

Water hoarhound

Lycopus uniflorus

Northern bugleweed

Lysichiton americanus

Skunk cabbage

Madia exigua

Little tarweed

Madia glomerata

Mountain tarweed

Madia gracilis

Common tarweed

Madia madioides

Woodland tarweed

Madia sativa

Coast tarweed

Maianthemum dilatatum

False lily-of-the-valley

Marah oreganus

Manroot

Meconella oregana

White meconella

Megalodonta beckii

Water marigold

Melica bulbosa

Onion-grass

Melica smithii

Smith's melic-grass

Melica subulata

Alaska onion-grass

Mentha arvensis

Field mint

Menyanthes trifoliata

Buckbean

Menziesia ferruginea

Fool's huckleberry

Mertensia ciliata

Broad-leaf bluebells

Mertensia paniculata

Tall bluebells

Microseris laciniata

Cut-leaved microseris

Microsteris gracilis

Pink microsteris

Mimulus alsinoides

Chickweed monkey-flower

Mimulus guttatus

Common monkey-flower

Mimulus lewisii

Lewis's monkey-flower

Mimulus moschatus

Musk-flower

Mitella breweri

Brewer's mitrewort

Mitella caulescens

Leafy mitrewort

Mitella ovalis

Coastal mitrewort

Mitella pentandra

Alpine mitrewort

Moneses uniflora

Woodnymph

Monotropa uniflora

Single-flowered indian pipe

Montia cordifolia

Broad-leafed montia

Montia diffusa

Branching montia

Montia fontana

Water chickweed

Montia howellii

Howell's miner's-lettuce

Montia linearis

Narrow-leaf montia

Montia parvifolia

Streambank spring beauty

Montia perfoliata

Miner's lettuce

Montia sibirica

Candyflower

Montia spathulata

Pale montia

Myosotis laxa

Small-flowered forget-me-not

Myosotis verna

Spring forget-me-knot

Myrica gale

Sweet gale

Myriophyllum sibericum

Siberian water-milfoil

Najas flexilus

Wavy water-nymph

Navarretia squarrosa

Skunkweed

Nemophila parviflora

Small-flowered nemophila

Nothochelone nemorosa

Woodland beard-tongue

Nuphar polysepala

Pond lily

Oemleria cerasiformus

Indian plum

Oenanthe sarmentosa

Water parsley

Ophioglossum vulgatum

Adder's tongue

Oplopanax horridum

Devil's club

Orthocarpus attenuatus

Narrow-leaved owl-clover

Orthocarpus bracteosus

Rosy owl-clover

Orthocarpus castillejoides

Paintbrush owl-clover

Orthocarpus pusillus

Dwarf owl-clover

Osmorhiza chilensis

Mountain sweet-cicely

Oxalis oregana

Oregon wood-sorrel

Oxalis stricta

Upright yellow wood-sorrel

Pachistima myrsinites

Mountain box

Panicum scribnerianum

Scribner witchgrass

Parnassia fimbriata

Fringed grass-of-Parnassus

Pedicularis bracteosa

Bracted lousewort

Pedicularis contorta

Coiled lousewort

Pedicularis groenlandica

Elephant's head

Pedicularis ornithorhyncha

Bird's-beak lousewort

Pedicularis racemosa

Sickletop lousewort

Penstemon davidsonii

Davidson's penstemon

Penstemon procerus

Small-flowered penstemon

Penstemon serrulatus

Cascade penstemon

Petasites frigidus

Sweet coltsfoot

Phacelia hastata

White-leaf phacelia

Phacelia nemoralis

Woodland phacelia

Phacelia procera

Tall phacelia

Phacelia sericea

Silky phacelia

Philadelphus lewisii

Mock-orange

Phlox diffusa

Spreading phlox

Phlox hendersonii

Henderson's phlox

Phragmites communis

Common reed

Phyllodoce empetriformis

Red mountain heather

Phyllodoce glanduliflora

Yellow heather

Physocarpus capitatus

Pacific ninebark

Picea engalmannii

Engelmann spruce

Picea glauca

White spruce

Picea sitchensis

Sitka spruce

Pinguicula vulgaris

Butterwort

Pinus albicaulis

White-bark pine

Pinus contorta

Lodgepole pine

Pinus monticola

Western white pine

Pityrogramma triangularis

Gold-back fern

Plagiobothrys scouleri

Scouler's popcorn-flower

Plantago elongata

Slender plantain

Plantago maritima

Seaside plantain

Plantago patagonica

Candleweed

Plectritis congesta

Sea blush

Pleuricospora fimbriolata

Fringed pinesap

Pleuropogon refractus

Nodding semaphore-grass

Poa annua

Annual bluegrass

Poa bolanderi

Bolander's bluegrass

Poa compressa

Canadian bluegrass

Poa howellii

Howell's bluegrass

Poa marcida

Withered bluegrass

Polemonium californicum

California Jacob's-ladder

Polemonium pulcherrimum

Showy Jacob's ladder

Polygonum amphibium

Water smartweed

Polygonum douglasii

Douglas' knotweed

Polygonum fowleri

Fowler's knotweed

Polygonum hydropiper

Marshpepper smartweed

Polygonum hydropiperoides

Waterpepper

Polygonum lapathifolium

Willow weed

Polygonum minimum

Leafy dwarf knotweed

Polygonum punctatum

Water smartweed

Polygonum spergulariaeforme

Spurry knotweed

Polypodium amorphum

Irregular polypody

Polypodium glycyrrhiza

Licorice fern

Polystichum imbricans

Christmas-fern

Polystichum lonchitis

Holly fern

Polystichum munitum

Sword fern

Populus tremuloides

Quaking aspen

Populus trichocarpa

Black cottonwood

Potamogeton alpinus

Northern pondweed

Potamogeton amplifolius

Large-flowered pondweed

Potamogeton berchtoldii

Berchtold's pondweed

Potamogeton crispus

Curled pondweed

Potamogeton epihydrus

Ribbon-leaf pondweed

Potamogeton gramineus

Grass-leaved pondweed

Potamogeton illinoensis

Illinois pondweed

Potamogeton natans

Floating-leaf pondweed

Potamogeton pectinatus

Fennel-leaf pondweed

Potamogeton pusillus

Small pondweed

Potamogeton richardsonii

Richardson's pondweed

Potamogeton robbinsii

Robbin's pondweed

Potamogeton zosteriformis

Eel-grass pondweed

Potentilla anserina

Common silverweed

Potentilla drummondii

Drummond's cinquefoil

Potentilla flabellifolia

Fan-leaf cinquefoil

Potentilla glandulosa

Sticky cinquefoil

Potentilla gracilis

Graceful cinquefoil

Potentilla pacifica

Pacific silverweed

Potentilla palustris

Marsh cinquefoil

Potentilla paradoxa

Bushy cinquefoil

Prenanthes alata

Western rattlesnake-root

Prunella vulgaris

Self-heal

Prunus emarginata

Bitter cherry

Prunus virginiana

Chokecherry

Pseudotsuga menziesii

Douglas fir

Psilocarphus elatior

Tall woolly-heads

Psoralea physodes

California-tea

Pteridium aquilinum

Bracken

Pterospora andromedea

Pinedrops

Puccinellia nutkaensis

Pacific alkaligrass

Puccinellia nuttalliana

Nuttall's alkaligrass

Puccinellia pauciflora

Weak alkaligrass

Puccinellia pumila

Dwarf alkaligrass

Pyrola asarifolia

Pink wintergreen

Pyrola chlorantha

Green wintergreen

Pyrola picta

White-veined wintergreen

Pyrola secunda

One-sided wintergreen

Pyrus fusca

Crabapple

Quercus garryana

Oregon white oak

Ranunculus aquatilis

Water buttercup

Ranunculus cymbalaria

Shore buttercup

Ranunculus eschscholtzii

Snow buttercup

Ranunculus flammula

Lesser spearwort

Ranunculus occidentalis

Western buttercup

Ranunculus orthorhynchus

Straight-beak buttercup

Ranunculus pensylvanicus

Bristly buttercup

Ranunculus sceleratus

Celery-leaved buttercup

Ranunculus uncinatus

Little buttercup

Rhamnus purshiana

Cascara

Rhinanthus minor

Little yellow rattle-box

Rhododendron albiflorum

White rhododendron

Rhododendron macrophyllum

Western rhododendron

Rhus diversiloba

Poison oak

Rhyncospora alba

White-beaked rush

Ribes bracteosum

Stink currant

Ribes divaricatum

Coast black gooseberry

Ribes howellii

Maple-leaf currant

Ribes lacustre

Prickly currant

Ribes laxiflorum

Trailing black currant

Ribes sanguineum

Red-flowered currant

Rorippa curvisiliqua

Western yellowcress

Rorippa islandica

Marsh yellowcress

Rosa gymnocarpa

Baldhip rose

Rosa nutkana

Nootka rose

Rosa pisocarpa

Clustered wild rose

Rubus idaeus

Red raspberry

Rubus lasiococcus

Dwarf bramble

Rubus leucodermis

Blackcap

Rubus nivalis

Snow bramble

Rubus parviflorus

Thimbleberry

Rubus pedatus

Strawberry bramble

Rubus spectabilis

Salmonberry

Rubus ursinus

Wild blackberry

Rumex maritimus

Golden dock

Rumex occidentalis

Western dock

Rumex salicifolius

Willow dock

Ruppia maritima

Ditchgrass

Sagina crassicaulis

Stickystem pearlwort

Sagina occidentalis

Western pearlwort

Sagittaria latifolia

Broadleaf arrowhead

Salicornia virginica

Pickleweed

Salix barclayi

Barclay's willow

Salix commutata

Variable willow

Salix geyeriana

Geyer willow

Salix hookeriana

Hooker's willow

Salix idahoensis

Idaho wilow

Salix lasiandra

Pacific willow

Salix pedicellaris

Bog willow

Salix piperi

Piper's willow

Salix planifolia

Diamond leaf willow

Salix rigida

Mackenzie willow

Salix scouleriana

Scouler willow

Salix sitchensis

Sitka willow

Sambucus cerulea

Blue elderberry

Sambucus racemosa

Red elderberry

Sanguisorba sitchensis

Sitka burnet

Sanicula bipinnatifida

Purple sanicle

Sanicula crassicaulis

Pacific sanicle

Satureja douglasii

Yerba buena

Saxifraga arguta

Brook saxifrage

Saxifraga bronchialis

Spotted saxifrage

Saxifraga caespitosa

Tufted saxifrage

Saxifraga ferruginea

Rusty saxifrage

Saxifraga integrifolia

Grassland saxifrage

Saxifraga mertensiana

Merten's saxifrage

Saxifraga nidifica

Nesting saxifrage

Saxifraga occidentalis

Western saxifrage

Saxifraga punctata

Dotted saxifrage

Saxifraga tolmiei

Alpine saxifrage

Scheuchzeria palustris

Scheuchzeria

Scirpus acutus

Hard-stem bulrush

Scirpus caespitosus

Tufted clubrush

Scirpus cernuus

Low clubrush

Scirpus cyperinus

Wool-grass

Scirpus fluviatilis

River bulrush

Scirpus maritimus

Seacoast bulrush

Scirpus microcarpus

Small-flowered bulrush

Scirpus pungens

Three-square bulrush

Scirpus validus

Soft-stem bulrush

Scutellaria galericulata

Marsh skullcap

Scutellaria lateriflora

Mad-dog skullcap

Sedum divergens

Spreading stonecrop

Sedum oreganum

Oregon stonecrop

Sedum spathulifolium

Broadleaved stonecrop

Selaginella wallacei

Wallace's selaginella

Senecio cymbalarioides

Alpine meadow butterweed

Sidalcea hendersonii

Henderson's checker-mallow

Silene menziesii

Menzies' silene

Sisyrinchium angustifolium

Blue-eyed grass

Sisyrinchium californicum

Golden-eyed grass

Sium suave

Water-parsnip

Smilacina racemosa

False Solomon's seal

Smilacina stellata

Star-flowered Solomon's seal

Solanum triflorum

Cut-leaf nightshade

Solidago canadensis

Meadow goldenrod

Solidago multiradiata

Northern goldenrod

Solidago occidentalis

Western goldenrod

Sorbus scopulina

Cascade mountain-ash

Sorbus sitchensis

Sitka mountain-ash

Sparganium angustifolium

Floating bur-reed

Sparganium emersum

Simplestem bur-reed

Sparganium eurycarpum

Broad-fruited bur-reed

Spiraea betulifolia

Birch-leafed spirea

Spiraea densiflora

Rosy spirea

Spiraea douglasii

Hardhack

Spiraea pyramidata

Pyramid spiraea

Spiranthes romanzoffiana

Hooded ladies-tresses

Spirodela polyrhiza

Great duckweed

Stachys cooleyae

Cooley's hedge-nettle

Stachys mexicana

Mexican betony

Stachys rigida

Rough hedge-nettle

Stellaria borealis

Northern starwort

Stellaria calycantha

Northern starwort

Stellaria crispa

Crisped starwort

Stellaria humifusa

Spreading starwort

Stellaria longifolia

Long-leaved starwort

Stellaria nitens

Shining chickweed

Stenanthium occidentale

Bronze bells

Streptopus amplexifolius

Clasping-leaved twisted-stalk

Streptopus roseus

Rosy twisted-stalk

Streptopus streptopoides

Kruhsea

Symphoricarpos albus

Common snowberry

Symphoricarpos mollis

Creeping snowberry

Taxus brevifolia

Western yew

Tellima grandiflora

Fringecup

Thalictrum occidentale

Western meadowrue

Thelypodium laciniatum

Thick-leaved thelepody

Thelypteris limbosperma

Mountain fern

Thelypteris phegopteris

Beech fern

Thuja plicata

Western red cedar

Tiarella trifoliata

Foamflower

Tofieldia glutinosa

Bog lily

Tolmiea menziesii

Youth-on-age

Trautvetteria caroliniensis

False bugbane

Trientalis arctica

Northern star-flower

Trientalis latifolia

Broadleaved starflower

Trifolium albopurpureum

Mcrae's clover

Trifolium microcephalum

Woolly clover

Trifolium microdon

Valparaiso clover

Trifolium oliganthum

Few-flowered clover

Trifolium tridentatum

Tomcat clover

Trifolium variegatum

White-tip clover

Trifolium wormskioldii

Springbank clover

Triglochin maritimum

Seaside arrowgrass

Trillium ovatum

White trillium

Triodanis perfoliata

Venus' looking-glass

Trisetum canescens

Tall trisetum

Trisetum cernuum

Nodding trisetum

Tsuga heterophylla

Western hemlock

Tsuga mertensiana

Mountain hemlock

Typha angustifolia

Narrow-leved cattail

Typha latifolia

Common cattail

Umbellularia californica

Bay tree

Urtica dioica

Stinging nettle

Utricularia gibba

Gibbous bladderwort

Utricularia intermedia

Mountain bladderwort

Utricularia minor

Lesser bladderwort

Utricularia vulgaris

Common bladderwort

Vaccinium alaskense

Alaska blueberry

Vaccinium caespitosum

Dwarf bilberry

Vaccinium deliciosum

Cascade huckleberry

Vaccinium membranaceum

Mountain huckleberry

Vaccinium ovalifolium

Oval-leafed huckleberry

Vaccinium ovatum

Evergreen huckleberry

Vaccinium oxycoccos

Wild cranberry

Vaccinium parvifolium

Red huckleberry

Vaccinium scoparium

Grouseberry

Valeriana californica

California valerian

Valeriana sitchensis

Sitka valerian

Vallisneria americana

American wild cerery

Veratrum californicum

California false hellebore

Veratrum viride

Green false hellebore

Verbena bracteata

Bracted vervain

Veronica americana

American brooklime

Veronica peregrina

Purslane speedwell

Veronica scutellata

Marsh speedwell

Veronica serpyllifolia

Thyme-leaf speedwell

Veronica wormskjoldii

Alpine speedwell

Viburnum edule

Highbush cranberry

Viburnum ellipticum

Oregon viburnum

Viburnum opulus

Snowball

Vicia americana

American vetch

Vicia gigantea

Giant vetch

Viola adunca

Early blue violet

Viola glabella

Stream violet

Viola howellii

Howell's violet

Viola langsdorfii

Aleutian violet

Viola macloskeyi

Small white violet

Viola orbiculata

Round-leaved violet

Viola palustris

Marsh violet

Viola sempervirens

Evergreen violet

Woodsia scopulina

Rocky Mtn. woodsia

Woodwardia fimbriata

Chain fern

Xerophyllum tenax

Beargrass

Zannichellia palustris

Horned pondweed

Zigadenus venenosus

Meadow death camas

Zostera marina

Wide-blade eelgrass