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Riparian areas

Plant Database
Inflorescence reddish plume like, green leaves
Spike Bentgrass
Agrostis exarata
Grass
Native
a cluster of reddish brown samaras.
Tree of Heaven
Ailanthus altissima
Invasive
A full white alder tree in a neighborhood. Tree is probably 20-30' tall with a full yet narrow canopy.
White Alder
Alnus rhombifolia
Native
a young branch of red alder green leaves are pinnately veined, obtuse to elliptic in shape
Red Alder
Alnus rubra
Native
Tall spire of smaller purple flowers with yellow and white stamen
Indigo Bush
Amorpha fruticosa
Invasive
a patch of mugwort with thin leaved green foliage along upright non-woody stems
Douglas’ Sagewort
Artemisia douglasiana
Native
Field of tall stalks of long skinny leaves
Giant Reed
Arundo donax
Grass
Invasive
loosely arranged compound leaves of lady fern with deeply dissected leaflets
Lady Fern
Athyrium filix-femina
Native
tapering spikes of purple flowers thrust out from lance shaped leaves
Butterfly Bush
Buddleja davidii
Invasive
Cluster of small white and pink flowers
Flowering Rush
Butomus umbellatus
Invasive
a spike of star shaped purple camas flowers
Great Camas
Camassia leichtlinii ssp suksdorfii
Native
close up of a dense sedge sowing bunch like form and long linear leaves
Dense Sedge
Carex densa
Grass
Native
A thin-leaved clump of sedge with leavesarising from central base, extending upward, then drooping.
Dewey’s Sedge
Carex deweyana
Grass
Native
A field of slough sedge plants. Tough leaves that catch the light.
Slough Sedge
Carex obnupta
Grass
Native
a single chamisso sedge with leaves a littl eunder half the height of the inflorescence stalks, which rise above and nod
Chamisso Sedge
Carex pachystachya
Grass
Native
Meadow Knapweed Centaurea pratensis Purple flowers on long stems
Meadow Knapweed
Centaurea pratensis (aka Centaurea jacea x nigra, Centaurea debeauxii ssp. thuillieri)
Invasive
Bull Thistle Cirsium vulgare Spiny casing with purple tuft at top
Bull Thistle
Cirsium vulgare
Invasive
Old Man's Beard Clematis vitalba Tree with white flowers
Old Man’s Beard
Clematis vitalba
Invasive
white dogwood flowers have four oversized white tepals surrounding a cluster of inconspicuous flowers; acuminate leaf shape.
Pacific Dogwood
Cornus nuttallii
Native
red-osier dogwood shrub in a yard
Red-Osier Dogwood
Cornus sericea
Native
a branch of hawthorn with lobed, mitten like leaves.
English Hawthorn
Crataegus monogyna
Invasive
Close up of small yellow flowers
Scotch Broom
Cytisus scoparius
Invasive
a thin stalked larskspur with dissected foliage and multiple blue flowers
Columbia Larkspur
Delphinium trollifollium
Native
Tufted Hair Grass (Kalapuya) Deschampsia cespitosa Clump of grass with seed heads
Tufted Hairgrass
Deschampsia cespitosa
Grass
Native
drooping pink flowers
Pacific Bleeding Heart
Dicentra formosa
Native
Oblong tapered leaf with serated edges
Cutleaf Teasel
Dipsacus laciniatus
Invasive
a patch of ferns that taper and curve
California Wood Fern
Dryopteris arguta
Native
Stemps with small white bell shaped flowers
Spanish Heath
Erica lusitanica
Invasive
an orangey red trumpet shaped flower with petals curving back
Scarlet Monkeyflower
Erythranthe cardinalis
Native
Oblong Spurge Euphorbia oblongata 3 large leaves with 3 smaller leaves coming out of center
Oblong or Eggleaf Spurge
Euphorbia oblongata
Invasive
Japanese Knotweed Fallopia japonica Large green bushy shrub with tall stalks of opposite heart shaped leaves
Knotweeds
Fallopia/Polygonum spp.
Invasive
Side view of typical carrot family flower umbels with yellow flowers.
Fennel
Foeniculum vulgare
Invasive
Oregon Ash Fraxinus latifolia Large ogblong smooth leaves
Oregon Ash
Fraxinus latifolia
Native
a palmate leaf with toothed edge
Largeleaf Avens
Geum macrophyllum
Native
an oceansprayshrub in bloom
Oceanspray
Holodiscus discolor
Native
a patch of meadow barley with reddish brown inflorescences
Meadow Barley
Hordeum brachyantherum
Grass
Native
Close up of showy orange trumpet like flowers
Spotted Jewelweed
Impatiens capensis
Invasive
Policeman’s Helmet Impatiens glandulifera Several purple and white flowers on small stems
Policeman’s Helmet
Impatiens glandulifera
Invasive
Yellow Flag Iris Iris pseudacorus Large yellow flower with large petals
Yellow Flag Iris
Iris pseudacorus
Invasive
Bunches of iris like leaves with clusters of small off-white to brown flowers
Dagger-leaf Rush
Juncus ensifolius
Grass
Native
Yellow Archangel Lamiastrum galeobdolon Groundcover of green and white varigated leaves
Yellow Archangel
Lamiastrum galeobdolon
Invasive
a cluster of orangey yellow tubular flowers subtended by fused leaves.
Orange Honeysuckle
Lonicera ciliosa
Native
pink honeysuckle flowers and fused opposite leaves
Hairy Honeysuckle
Lonicera hispidula
Native
the black twin berries of Black Twinberry
Black Twinberry
Lonicera involucrata
Native
Small yellow flower
Large-Flower Primrose Willow
Ludwigia grandiflora ssp. grandiflora
Invasive
Juvenile Ludwigia leaves are spatulate in shape and star-shaped in arrangement.
Six-Petal Water Primrose
Ludwigia grandiflora ssp. hexapetala
Invasive
Floating Primrose-willow Ludwigia peploides Large floating mat of long slender green leaves and small yellow flowers
Floating Primrose-Willow
Ludwigia peploides
Invasive
the large palmate leaves and purple to white flowers of large leaf lupine
Bigleaf Lupine
Lupinus polyphyllus
Native
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