Small-flowered alumroot
|
Saxifragaceae
|
Hieracium albiflorum
|
White-flowered hawkweed
|
Asteraceae
|
Hieracium cynoglossoides
|
Hounds-tongue hawkweed
|
Asteraceae
|
Hieracium scouleri
|
Scouler's hawkweed
|
Asteraceae
|
Hippuris vulgaris
|
Mare's tail
|
Hippuridacee
|
Holcus lanatus*
|
Common velvet grass
|
Poaceae
|
Holodiscus discolor
|
Ocean spray
|
Rosaceae
|
Honkenya peploides
|
Sea purslane
|
Caryophyllaceae
|
Hordeum brachyantherum
|
Meadow barley
|
Poaceae
|
Hordeum jubatum
|
Foxtail barley
|
Poaceae
|
Hordeum murinum*
|
Wall barley
|
Poaceae
|
Hutchinsia procumbens
|
Hutchinsia
|
Brassicaceae
|
Hypericum anagalloides
|
Bog St. John's-wort
|
Hypericaceae
|
Hypericum formosum
|
Western St.John's-wort
|
Hypericaceae
|
Hypericum perforatum*
|
Klamath weed
|
Hypericaceae
|
Hypochaeris glabra*
|
Smooth cat's-ear
|
Asteraceae
|
Hypochaeris radicata*
|
Hairy cat's-ear
|
Asteraceae
|
Ilex aquifolium*
|
English holly
|
Aquifoliaceae
|
Iris missouriensis
|
Western blue flag
|
Iridaceae
|
Isoetes lacustris
|
Lake quillwort
|
Isoetaceae
|
Jaumea carnosa
|
Fleshy jaumea
|
Asteraceae
|
Juncus acuminatus
|
Tapered rush
|
Juncaceae
|
Juncus articulatus
|
Jointed rush
|
Juncaceae
|
Juncus balticus
|
Baltic rush
|
Juncaceae
|
Juncus bolanderi
|
Bolander's rush
|
Juncaceae
|
Juncus bufonius*
|
Toad rush
|
Juncaceae
|
Juncus effusus
|
Soft rush
|
Juncaceae
|
Juncus ensifolius
|
Daggerleaf rush
|
Juncaceae
|
Juncus gerardii
|
Mud rush
|
Juncaceae
|
Juncus lesueurii
|
Brewer's rush
|
Juncaceae
|
Juncus tenuis
|
Slender rush
|
Juncaceae
|
Juniperus communis
|
Mountain juniper
|
Cupressaceae
|
Juniperus scopulorum
|
Rocky Mountain juniper
|
Cupressaceae
|
Kalmia microphylla
|
Alpine laurel
|
Ericaceae
|
Kalmia occidentalis
|
Western swamp laurel
|
Ericaceae
|
Koeleria cristata
|
Prairie junegrass
|
Poaceae
|
Lactuca biennis*
|
Tall blue lettuce
|
Asteraceae
|
Lactuca muralis*
|
Wall lettuce
|
Asteraceae
|
Lactuca serriola*
|
Prickly lettuce
|
Asteraceae
|
Lamium amplexicaule*
|
Henbit
|
Lamiaceae
|
Lamium purpureum*
|
Red dead-nettle
|
Lamiaceae
|
Lapsana communis*
|
Nipplewort
|
Asteraceae
|
Lasthenia minor
|
Lasthenia
|
Asteraceae
|
Lathyrus japonicus
|
Maritime peavine
|
Fabaceae
|
Lathyrus latifolius*
|
Everlasting peavine
|
Fabaceae
|
Lathyrus littoralis
|
Beach peavine
|
Fabaceae
|
Lathyrus nevadensis
|
Nuttall's peavine
|
Fabaceae
|
Lathyrus palustris
|
Marsh peavine
|
Fabaceae
|
Lathyrus polyphyllus
|
Leafy peavine
|
Fabaceae
|
Ledum groenlandicum
|
Labrador tea
|
Ericaceae
|
Lemna minor
|
Common duckweed
|
Lemnaceae
|
Lemna trisulca
|
Star duckweed
|
Lemnaceae
|
Lemna turionifera
|
Turion duckweed
|
Lemnaceae
|
Leontodon autumnalis*
|
Fall dandelion
|
Asteraceae
|
Lepidium densiflorum
|
Common pepperweed
|
Brassicaceae
|
Lepidium heterophyllum*
|
Purple-anther pepperweed
|
Brassicaceae
|
Lepidium virginicum
|
Tall pepperweed
|
Brassicaceae
|
Lilaeopsis occidentalis
|
Lilaeopsis
|
Apiaceae
|
Lilium columbianum
|
Tiger lily
|
Liliaceae
|
Linanthus bicolor
|
Bicolored linanthus
|
Polemoniaceae
|
Linnaea borealis
|
Twinflower
|
Caprifoliaceae
|
Lithophragma parviflorum
|
Small-flowered prairie-star
|
Saxifragaceae
|
Lithospermum ruderale
|
Columbia puccoon
|
Boraginaceae
|
Lolium multiflorum*
|
Italian ryegrass
|
Poaceae
|
Lomatium nudicaule
|
Pestle parsnip
|
Apiaceae
|
Lomatium utriculatum
|
Spring gold
|
Apiaceae
|
Lonicera ciliosa
|
Orange honeysuckle
|
Caprifoliaceae
|
Lonicera hispidula
|
California honeysuckle
|
Caprifoliaceae
|
Lonicera involucrata
|
Black twinberry
|
Caprifoliaceae
|
Lotus corniculatus*
|
Birdsfoot trefoil
|
Fabaceae
|
Lotus denticulatus
|
Meadow lotus
|
Fabaceae
|
Lotus micranthus
|
Miniature lotus
|
Fabaceae
|
Lunaria annua*
|
Money plant
|
Brassicaceae
|
Lupinus albicaulis
|
Sickle-keeled lupine
|
Fabaceae
|
Lupinus arboreus
|
Tree lupine
|
Fabaceae
|
Lupinus bicolor
|
Two-color lupine
|
Fabaceae
|
Lupinus littoralis
|
Seashore lupine
|
Fabaceae
|
Lupinus microcarpus
|
Chick lupine
|
Fabaceae
|
Lupinus rivularis
|
Streambank lupine
|
Fabaceae
|
Luzula campestris
|
Field woodrush
|
Juncaceae
|
Luzula parviflora
|
Small-flowered woodrush
|
Juncaceae
|
Lychnis alba*
|
White campion
|
Caryophyllaceae
|
Lycopus uniflorus
|
Northern bugleweed
|
Lamiaceae
|
Lysichiton americanus
|
Skunk cabbage
|
Araceae
|
Madia exigua
|
Little tarweed
|
Asteraceae
|
Madia glomerata
|
Mountain tarweed
|
Asteraceae
|
Madia gracilis
|
Common tarweed
|
Asteraceae
|
Madia madioides
|
Woodland tarweed
|
Asteraceae
|
Madia sativa
|
Coast tarweed
|
Asteraceae
|
Maianthemum dilatatum
|
False lily-of-the-valley
|
Liliaceae
|
Malva moschata*
|
Musk mallow
|
Malvaceae
|
Malva neglecta*
|
Dwarf mallow
|
Malvaceae
|
Marah oreganus
|
Manroot
|
Cucurbitaceae
|
Marrubium vulgare*
|
Horehound
|
Lamiaceae
|
Matricaria chamomilla*
|
Wild chamomile
|
Asteraceae
|
Matricaria maritima*
|
Scentless may-weed
|
Asteraceae
|
Matricaria matricarioides*
|
Pineapple weed
|
Asteraceae
|
Meconella oregana
|
White meconella
|
Papaveraceae
|
Medicago lupulina*
|
Black medic
|
Fabaceae
|
Medicago sativa*
|
Alfalfa
|
Fabaceae
|
Melica subulata
|
Alaska onion-grass
|
Poaceae
|
Melilotus alba*
|
White sweet-clover
|
Fabaceae
|
Mentha arvensis
|
Field mint
|
Lamiaceae
|
Menyanthes trifoliata
|
Buckbean
|
Menyanthaceae
|
Microseris laciniata
|
Cut-leaved microseris
|
Asteraceae
|
Microsteris gracilis
|
Pink microsteris
|
Polemoniaceae
|
Mimulus alsinoides
|
Chickweed monkey-flower
|
Scrophulariaceae
|
Mimulus dentatus
|
Toothed-leaf monkey-flower
|
Scrophulariaceae
|
Mimulus guttatus
|
Common monkey-flower
|
Scrophulariaceae
|
Mimulus moschatus
|
Musk-flower
|
Scrophulariaceae
|
Monotropa uniflora
|
Single-flowered indian pipe
|
Ericaceae
|
Montia fontana
|
Water chickweed
|
Portulacaceae
|
Montia linearis
|
Narrow-leaf montia
|
Portulacaceae
|
Montia parvifolia
|
Streambank spring beauty
|
Portulacaceae
|
Montia perfoliata
|
Miner's lettuce
|
Portulacaceae
|
Montia sibirica
|
Candyflower
|
Portulacaceae
|
Montia spathulata
|
Pale montia
|
Portulacaceae
|
Myosotis discolor*
|
Yellow & blue forget-me-not
|
Boraginaceae
|
Myosotis laxa
|
Small-flowered forget-me-not
|
Boraginaceae
|
Myosotis micrantha*
|
Blue forget-me-not
|
Boraginaceae
|
Myosotis verna
|
Spring forget-me-knot
|
Boraginaceae
|
Myosurus minimus
|
Common mousetail
|
Ranunculaceae
|
Myriophyllum spicatum*
|
Spiked water-milfoil
|
Haloragaceae
|
Najas flexilus
|
Wavy water-nymph
|
Najadaceae
|
Navarretia squarrosa
|
Skunkweed
|
Polemoniaceae
|
Nemophila parviflora
|
Small-flowered nemophila
|
Hydrophyllaceae
|
Nemophila pedunculata
|
Meadow nemophila
|
Hydrophyllaceae
|
Nepeta cataria*
|
Catnip
|
Lamiaceae
|
Nuphar polysepala
|
Pond lily
|
Nymphaeaceae
|
Nymphaea odorata*
|
American water-lily
|
Nymphaeaceae
|
Oemleria cerasiformus
|
Indian plum
|
Rosaceae
|
Oenanthe sarmentosa
|
Water parsley
|
Apiaceae
|
Oenothera erythrosepala*
|
Red-sepaled evening-primrose
|
Onagraceae
|
Oenothera strigosa
|
Common evening-primrose
|
Onagraceae
|
Oplopanax horridum
|
Devil's club
|
Araliaceae
|
|