Cerastium vulgatum*
|
Mouse-ear chickweed
|
Caryophyllaceae
|
Ceratophyllum demersum
|
Hornwort
|
Ceratophyllaceae
|
Ceratophyllum echinatum
|
Thornwort
|
Ceratophyllaceae
|
Cheilanthes feei
|
Fee's lip-fern
|
Polypodiaceae
|
Chenopodium album*
|
Pigweed
|
Chenopodiaceae
|
Chenopodium rubrum*
|
Red goosefoot
|
Chenopodiaceae
|
Chimaphila umbellata
|
Pipsissewa
|
Ericaceae
|
Chrysanthemum leucanthemum*
|
Ox-eye daisy
|
Asteraceae
|
Chrysopsis villosa
|
Hairy golden-aster
|
Asteraceae
|
Cicuta douglasii
|
Water-hemlock
|
Apiaceae
|
Circaea alpina
|
Enchanter's nightshade
|
Onagraceae
|
Cirsium arvense*
|
Canada thistle
|
Asteraceae
|
Cirsium brevistylum
|
Indian thistle
|
Asteraceae
|
Cirsium vulgare*
|
Bull thistle
|
Asteraceae
|
Claytonia parviflora
|
Streambank spring beauty
|
Portulacaceae
|
Claytonia rubra
|
Red miner's lettuce
|
Portulacaceae
|
Collinsia grandiflora
|
Large-flowered blue-eyed Mary
|
Scrophulariaceae
|
Collinsia parviflora
|
Small-flowered blue-eyed Mary
|
Scrophulariaceae
|
Collomia heterophylla
|
Varied-leaf collomia
|
Polemoniaceae
|
Comandra umbellata
|
Bastard toad-flax
|
Santalaceae
|
Conioselinum pacificum
|
Pacific hemlock-parsley
|
Apiaceae
|
Conium maculatum*
|
Poison hemlock
|
Apiaceae
|
Convolvulus arvensis*
|
Field morning-glory
|
Convolvulaceae
|
Convolvulus sepium*
|
Lady's nightcap
|
Convolvulaceae
|
Convolvulus soldanella
|
Beach morning-glory
|
Convolvulaceae
|
Conyza canadensis*
|
Horseweed
|
Asteraceae
|
Corallorhiza maculata
|
Spotted coral-root
|
Orchidaceae
|
Corallorhiza striata
|
Striped coral-root
|
Orchidaceae
|
Cornus canadensis
|
Bunchberry
|
Cornaceae
|
Cornus nuttallii
|
Pacific dogwood
|
Cornaceae
|
Cornus stolonifera
|
Red-osier dogwood
|
Cornaceae
|
Coronopus didymus*
|
Wartcress
|
Brassicaceae
|
Corylus cornuta
|
Hazelnut
|
Betulaceae
|
Cotula coronopifolia*
|
Brass buttons
|
Asteraceae
|
Crataegus douglasii
|
Black hawthorn
|
Rosaceae
|
Crataegus monogyna*
|
English hawthorn
|
Rosaceae
|
Crepis atrabarba
|
Slender hawksbeard
|
Asteraceae
|
Crepis capillaris*
|
Smooth hawksbeard
|
Asteraceae
|
Crepis modocensis
|
Low hawksbeard
|
Asteraceae
|
Crocidium multicaule
|
Goldstar
|
Asteraceae
|
Cuscuta epithymum
|
Common dodder
|
Cuscutaceae
|
Cuscuta salina
|
Saltmarsh dodder
|
Cuscutaceae
|
Cytisus scoparius*
|
Scot's broom
|
Fabaceae
|
Dactylis glomerata*
|
Orchard grass
|
Poaceae
|
Danthonia californica
|
California oatgrass
|
Poaceae
|
Daphne laureola*
|
Spurge laurel
|
Thymelaeaceae
|
Daucus carota*
|
Queen Anne's lace
|
Apiaceae
|
Daucus pusillus
|
American carrot
|
Apiaceae
|
Delphinium menziesii
|
Mountain larkspur
|
Ranunculaceae
|
Delphinium nuttallii
|
Nuttall's larkspur
|
Ranunculaceae
|
Deschampsia caespitosa
|
Tufted hairgrass
|
Poaceae
|
Deschampsia elongata
|
Slender hairgrass
|
Poaceae
|
Descurainia pinnata
|
Western tansymustard
|
Brassicaceae
|
Digitalis purpurea*
|
Foxglove
|
Scrophulariaceae
|
Dipsacus sylvestris*
|
Teasel
|
Dipsacaceae
|
Distichlis spicata
|
Seashore salt grass
|
Poaceae
|
Dodecatheon hendersonii
|
Broad-leaf shooting star
|
Primulaceae
|
Dodecatheon pulchellum
|
Few-flowered shooting star
|
Primulaceae
|
Draba nemerosa
|
Wood's draba
|
Brassicaceae
|
Draba verna
|
Spring whitlow-grass
|
Brassicaceae
|
Drosera rotundifolia
|
Round-leaf sundew
|
Droseraceae
|
Dryopteris expansa
|
Spreading wood-fern
|
Polypodiaceae
|
Dulichium arundinaceum
|
Dulichium
|
Cyperaceae
|
Eleocharis palustris
|
Common spike-rush
|
Cyperaceae
|
Elodea canadensis
|
Canadian waterweed
|
Hydrocharitaceae
|
Elymus lanceolatus
|
Streambank wheatgrass
|
Poaceae
|
Elymus mollis
|
American dunegrass
|
Poaceae
|
Empetrum nigrum
|
Crowberry
|
Empetraceae
|
Epilobium angustifolium
|
Fireweed
|
Onagraceae
|
Epilobium minutum
|
Small-flowered willow-herb
|
Onagraceae
|
Epilobium paniculatum
|
Tall annual willow-herb
|
Onagraceae
|
Epilobium watsonii
|
Watson's willow-herb
|
Onagraceae
|
Equisetum arvense
|
Common horsetail
|
Equisetaceae
|
Equisetum hyemale
|
Scouring rush
|
Equisetaceae
|
Equisetum telmateia
|
Giant horsetail
|
Equisetaceae
|
Equisetum variegatum
|
Northern scouringrush
|
Equisetaceae
|
Erigeron philadelphicus
|
Philadelphia daisy
|
Asteraceae
|
Erigeron speciosus
|
Showy fleabane
|
Asteraceae
|
Erigeron subtrinervis
|
Three-veined fleabane
|
Asteraceae
|
Eriophorum chamissonis
|
Chamisso's cottongrass
|
Cyperaceae
|
Eriophyllum lanatum
|
Oregon sunshine
|
Asteraceae
|
Erodium cicutarium*
|
Filaree
|
Geraniaceae
|
Erythronium grandiflorum
|
Glacier lily
|
Liliaceae
|
Erythronium oregonum
|
Giant fawn-lily
|
Liliaceae
|
Eschscholzia californica*
|
California poppy
|
Papaveraceae
|
Euphorbia lathyrus*
|
Mole plant
|
Euphorbiaceae
|
Festuca arundinacea*
|
Tall fescue
|
Poaceae
|
Festuca bromoides*
|
Barren fescue
|
Poaceae
|
Festuca idahoensis
|
Blue bunchgrass
|
Poaceae
|
Festuca myuros*
|
Rat-tail fescue
|
Poaceae
|
Festuca occidentalis
|
Western fescue
|
Poaceae
|
Festuca octoflora
|
Slender fescue
|
Poaceae
|
Festuca roemeri
|
Roemer's fescue
|
Poaceae
|
Festuca rubra
|
Red fescue
|
Poaceae
|
Festuca subulata
|
Bearded fescue
|
Poaceae
|
Foeniculum vulgare*
|
Fennel
|
Apiaceae
|
Fragaria chiloensis
|
Coastal strawberry
|
Rosaceae
|
Fragaria vesca
|
Wild strawberry
|
Rosaceae
|
Fragaria virginiana
|
Woods strawberry
|
Rosaceae
|
Fritillaria camschatcensis
|
Black lily
|
Liliaceae
|
Fritillaria lanceolata
|
Chocolate lily
|
Liliaceae
|
Galium aparine
|
Cleavers
|
Rubiaceae
|
Galium boreale
|
Northern bedstraw
|
Rubiaceae
|
Galium trifidum
|
Small bedstraw
|
Rubiaceae
|
Galium triflorum
|
Fragrant bedstraw
|
Rubiaceae
|
Gaultheria shallon
|
Salal
|
Ericaceae
|
Gentiana amarella
|
Norhern gentian
|
Gentianaceae
|
Geranium dissectum*
|
Cut-leaf geranium
|
Geraniaceae
|
Geranium molle*
|
Dovefoot geranium
|
Geraniaceae
|
Geranium robertianum*
|
Stinky Bob
|
Geraniaceae
|
Geum macrophyllum
|
Large-leaved avens
|
Rosaceae
|
Geum triflorum
|
Prairie smoke
|
Rosaceae
|
Gilia aggregata
|
Skyrocket
|
Polemoniaceae
|
Gilia capitata
|
Globe gilia
|
Polemoniaceae
|
Glaux maritima
|
Sea milkwort
|
Primulaceae
|
Glecoma hederacea*
|
Creeping Charlie
|
Lamiaceae
|
Glehnia leiocarpa
|
American glehnia
|
Apiaceae
|
Glyceria occidentalis
|
Western mannagrass
|
Poaceae
|
Gnaphalium chilense
|
Cottonbatting cudweed
|
Asteraceae
|
Gnaphalium palustre
|
Lowland cudweed
|
Asteraceae
|
Gnaphalium purpureum
|
Purple cudweed
|
Asteraceae
|
Gnaphalium uliginosum*
|
Marsh cudweed
|
Asteraceae
|
Goodyera oblongifolia
|
Rattlesnake-plantain
|
Orchidaceae
|
Grindelia integrifolia
|
Coastal gumweed
|
Asteraceae
|
Grindelia nana
|
Low gumweed
|
Asteraceae
|
Grindelia stricta
|
Oregon gumweed
|
Asteraceae
|
Gymnocarpium dryopteris
|
Oak fern
|
Polypodiaceae
|
Habenaria dilatata
|
White bog-orchid
|
Orchidaceae
|
Habenaria elegans
|
Elegant rein-orchid
|
Orchidaceae
|
Habenaria unalascensis
|
Alaska rein-orchid
|
Orchidaceae
|
Hedera helix*
|
English ivy
|
Araliaceae
|
Heracleum lanatum
|
Cow parsnip
|
Apiaceae
|
Heracleum mantegazzianum*
|
Giant hogweed
|
Apiaceae
|
Hesperis matronalis*
|
Dame's violet
|
Brassicaceae
|
Heuchera micrantha
|