Vascular Plant List
Island County
Island County, Washington. List covers plants found in Island County. Combination of plant lists of areas within Island County, with the addition of names of plants in the UW and WSU herbariums collected in Island County. 667 spp., 186 introduced.
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.
* - Introduced
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Scientific Name
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Common Name
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Family Name
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Abies grandis
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Grand fir
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Pinaceae
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Abronia latifolia
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Yellow sand verbena
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Nyctaginaceae
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Acer circinatum
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Vine maple
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Aceraceae
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Acer macrophyllum
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Big-leaf maple
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Aceraceae
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Achillea millefolium
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Yarrow
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Asteraceae
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Achlys triphylla
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Vanilla leaf
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Berberidaceae
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Adenocaulon bicolor
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Pathfinder
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Asteraceae
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Agastache urticifolia
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Nettle-leaf horse-mint
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Lamiaceae
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Agoseris elata
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Tall agoseris
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Asteraceae
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Agoseris grandiflora
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Large-flowered agoseris
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Asteraceae
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Agoseris heterophylla
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Annual agoseris
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Asteraceae
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Agropyron repens*
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Quack grass
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Poaceae
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Agropyron smithii
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Bluestem
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Poaceae
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Agrostis alba*
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Red top
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Poaceae
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Agrostis exarata*
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Spike bentgrass
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Poaceae
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Agrostis pallens
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Dune bentgrass
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Poaceae
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Agrostis stolonifera
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Creeping bentgrass
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Poaceae
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Agrostis tenuis*
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Colonial bentgrass
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Poaceae
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Aira caryophyllea*
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Silver hairgrass
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Poaceae
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Aira praecox*
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Early hairgrass
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Poaceae
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Alchemilla occidentalis
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Western lady's-mantle
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Rosaceae
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Allium acuminatum
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Taper-tip onion
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Liliaceae
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Allium cernuum
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Nodding onion
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Liliaceae
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Alnus rubra
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Red alder
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Betulaceae
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Alopecurus aequalis
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Short-awned foxtail
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Poaceae
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Amaranthus powellii*
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Powell's amaranth
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Amaranthaceae
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Amaranthus retroflexus*
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Red-root pigweed
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Amaranthaceae
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Ambrosia chamissonis
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Silver bursage
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Asteraceae
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Amelanchier alnifolia
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Serviceberry
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Rosaceae
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Ammophila arenaria*
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European beachgrass
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Poaceae
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Amsinckia intermedia
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Fireweed fiddleneck
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Boraginaceae
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Amsinckia menziesii
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Menzies' fiddleneck
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Boraginaceae
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Amsinckia retrorsa
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Rigid fiddleneck
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Boraginaceae
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Amsinckia spectabilis
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Sea-side amsinckia
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Boraginaceae
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Anaphalis margaritacea
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Pearly everlasting
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Asteraceae
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Angelica genuflexa
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Kneeling angelica
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Apiaceae
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Anthemis arvensis*
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Field chamomile
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Asteraceae
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Anthemis cotula*
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Dog fennel
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Asteraceae
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Anthoxanthum odoratum*
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Sweet vernalgrass
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Poaceae
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Anthriscus scandicina*
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Bur chervil
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Apiaceae
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Aquilegia formosa
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Red columbine
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Ranunculaceae
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Arabidopsis thaliana*
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Thale cress
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Brassicaceae
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Arabis glabra
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Tower mustard
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Brassicaceae
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Arabis hirsuta
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Hairy rockcress
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Brassicaceae
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Arbutus menziesii
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Pacific madrone
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Ericaceae
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Arctium minus*
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Common burdock
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Asteraceae
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Arctostaphylos uva-ursi
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Bearberry
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Ericaceae
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Arenaria serpyllifolia*
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Thyme-leaf sandwort
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Caryophyllaceae
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Arenaria tenella
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Slender stichwort
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Caryophyllaceae
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Armeria maritima
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Sea thrift
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Plumbaginaceae
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Arrhenatheram elatius*
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Oat-grass
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Poaceae
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Artemisia absinthium*
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Absinthe
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Asteraceae
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Artemisia campestris
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Northern wormwood
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Asteraceae
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Artemisia suksdorfii
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Suksdorf's sagewort
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Asteraceae
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Artemisia vulgaris*
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Mugwort
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Asteraceae
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Asarum caudatum
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Wild ginger
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Aristolochiaceae
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Aspidotus densa
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Indian's dream fern
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Polypodiaceae
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Aster curtus
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White-topped aster
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Asteraceae
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Aster eatonii
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Eaton's aster
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Asteraceae
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Aster subspicatus
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Douglas' aster
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Asteraceae
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Athyrium filix-femina
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Lady fern
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Polypodiaceae
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Athysanus pusillus
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Sandweed
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Brassicaceae
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Atriplex dioica*
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Rillscale
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Chenopodiaceae
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Atriplex patula
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Orache
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Chenopodiaceae
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Avena fatua*
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Wild oats
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Poaceae
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Azolla mexicana
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Mexican water-fern
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Salviniaceae
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Balsamorhiza deltoidea
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Puget balsamroot
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Asteraceae
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Barbarea orthoceras
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American wintercress
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Brassicaceae
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Bassia hyssopifolia
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Smotherweed
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Chenopodiaceae
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Bellis perennis*
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English daisy
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Asteraceae
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Berberis aquifolium
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Tall Oregongrape
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Berberidaceae
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Berberis nervosa
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Cascade Oregongrape
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Berberidaceae
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Berula erecta
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Cutleaf water-parsnip
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Apiaceae
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Betula papyrifera
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Paper birch
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Betulaceae
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Betula pendula*
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European white birch
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Betulaceae
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Bidens cernua
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Nodding beggar-ticks
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Asteraceae
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Blechnum spicant
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Deer fern
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Polypodiaceae
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Boisduvalia densiflora
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Dense spike-primrose
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Onagraceae
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Botrychium multifidum
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Leathery grape-fern
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Ophioglossaceae
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Brassica campestris*
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Common mustard
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Brassicaceae
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Brassica nigra*
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Black mustard
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Brassicaceae
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Brodiaea coronaria
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Harvest brodiaea
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Liliaceae
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Brodiaea howellii
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Howell's brodiaea
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Liliaceae
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Brodiaea hyacinthina
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Hyacinth brodiaea
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Liliaceae
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Bromus carinatus
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California brome
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Poaceae
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Bromus mollis*
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Soft brome
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Poaceae
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Bromus rigidus*
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Ripgut brome
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Poaceae
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Bromus sitchensis
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Alaska brome
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Poaceae
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Bromus tectorum*
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Cheat grass
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Poaceae
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Cakile edentula
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Searocket
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Brassicaceae
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Cakile maritima
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European searocket
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Brassicaceae
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Calamagrostis canadensis
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Bluejoint
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Poaceae
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Calandrinia ciliata
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Red maids
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Portulacaceae
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Calypso bulbosa
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Fairy slipper
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Orchidaceae
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Camassia leichtlinii
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Great camas
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Liliaceae
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Camassia quamash
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Common camas
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Liliaceae
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Campanula rotundifolia
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Common harebell
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Campanulaceae
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Campanula scouleri
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Scouler's harebell
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Campanulaceae
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Capsella bursa-pastoris*
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Shepherd's purse
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Brassicaceae
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Cardamine breweri
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Brewer's bittercress
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Brassicaceae
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Cardamine hirsuta*
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Hairy bittercress
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Brassicaceae
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Cardamine oligosperma
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Little Western bittercress
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Brassicaceae
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Cardamine pensylvanica
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Pennsylvania bittercress
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Brassicaceae
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Cardamine pulcherrima
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Spring beauty
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Brassicaceae
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Carex arcta
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Northern clustered sedge
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Cyperaceae
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Carex aurea
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Golden sedge
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Cyperaceae
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Carex brevicaulis
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Berm sedge
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Cyperaceae
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Carex canescens
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Silvery sedge
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Cyperaceae
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Carex cusickii
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Cusick's sedge
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Cyperaceae
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Carex deweyana
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Dewey's sedge
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Cyperaceae
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Carex hoodii
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Hood's sedge
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Cyperaceae
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Carex inops
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Long-stoloned sedge
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Cyperaceae
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Carex lenticularis
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Lenticular sedge
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Cyperaceae
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Carex lyngbyei
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Lingby's sedge
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Cyperaceae
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Carex macrocephala
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Dune sedge
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Cyperaceae
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Carex macrochaeta
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Large-awn sedge
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Cyperaceae
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Carex obnupta
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Slough sedge
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Cyperaceae
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Carex pansa
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Sand-dune sedge
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Cyperaceae
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Carex pensylvanica
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Pennsylvania sedge
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Cyperaceae
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Carex praticola
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Meadows sedge
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Cyperaceae
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Carex stipata
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Sawbeak sedge
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Cyperaceae
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Carex tumulicola
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Foothill sedge
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Cyperaceae
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Castilleja hispida
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Harsh paintbrush
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Scrophulariaceae
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Castilleja levisecta
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Golden indian-paintbrush
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Scrophulariaceae
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Castilleja miniata
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Scarlet paintbrush
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Scrophulariaceae
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Centaurea cyanus*
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Batchelor button
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Asteraceae
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Centaurea melitensis*
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Maltese starthistle
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Asteraceae
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Centaurea pratensis*
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Meadow knapweed
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Asteraceae
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Centaurium umbellatum*
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Common centaury
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Gentianaceae
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Cerastium arvense
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Field chickweed
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Caryophyllaceae
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Cerastium nutans
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Nodding chickweed
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Caryophyllaceae
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Cerastium semidecandrum*
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Chickweed
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Caryophyllaceae
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Cerastium viscosum*
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Sticky chickweed
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Caryophyllaceae
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