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Malheur Experiment Station
Oregon State University

Plants by Scientific Name where Native includes No


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jointed goatgrass (Aegilops cylindrica)
Aegilops cylindrica
Common Names jointed goatgrass
Family Grass
Flower Color Green-yellow
Native No
Weed No
butterfly bush (Buddleja sp.)
Buddleja sp.
Common Names butterfly bush
Family Butterfly bush
Plant Type Shrub
Native No
Weed Yes
hoary cress, whitetop (Cardaria spp.)
Cardaria spp.
Common Names hoary cress, whitetop
Family Mustard
Flower Color White
Plant Type Herb
Native No
Weed Noxious
diffuse knapweed (Centaurea diffusa)
Centaurea diffusa
Common Names diffuse knapweed
Family Composites, Sunflower
Flower Color Light Pink
Plant Type Forb
Native No
Weed No
spotted knapweed (Centaurea maculosa)Centaurea maculosa
Common Names spotted knapweed
Family Sunflower
Plant Type Forb
Native No
Weed Yes
yellow starthistle (Centaurea solstitialis)Centaurea solstitialis
Common Names yellow starthistle
Family Composites, Sunflower
Flower Color Yellow
Plant Type Forb
Native No
Weed Yes
chicory (Cichorium intybus)
Cichorium intybus
Common Names chicory
Family Composites, Sunflower
Flower Color Blue
Plant Type Herb
Location McCall
Native No
Weed Can be
Canada thistle (Cirsium arvense)
Cirsium arvense
Common Names Canada thistle
Family Composites, Sunflower
Flower Color Purple
Plant Type Herb
Short Description Perennial, deep-seated creeping underground roots. Leaves: Spiny, pinnatifid
Location McCall
Native No
Weed Noxious
bull thistle (Cirsium vulgare)
Cirsium vulgare
Common Names bull thistle
Family Composites, Sunflower
Flower Color Purple
Plant Type Herb
Short Description Biennial.
Location McCall
Native No
Weed Noxious
Yellow Nutsedge (Cyperus esculentus)Cyperus esculentus
Common Names yellow nutsedge
Family Sedge
Flower Color Yellowish
Plant Type Sedge
Native No
Weed Noxious
Russian Olive (Elaeagnus angustifolia)
Elaeagnus angustifolia
Common Names Russian Olive
Family Oleaster
Plant Type Tree
Native No
Weed Yes
storksbill, filaree (Erodium cicutarium)
Erodium cicutarium
Common Names storksbill, filaree
Family Geranium
Flower Color Pink, purple
Plant Type Herb
Short Description Leaves: Pinnate-pinnatifid. Native of Europe or Asia.
Location McCall
Native No
Weed No
Yellow Flag (Iris pseudacorus)Iris pseudacorus
Common Names yellow flag
Family Iris
Flower Color Yellow
Plant Type Forb
Short Description Introduced plant, conspicuous along edges of ponds, irrigation canals.
Native No
Weed Can be
marshelder (Iva xanthifolia)Iva xanthifolia
Common Names marshelder
Family Sunflower
Plant Type Forb
Native No
Weed Yes
butter and eggs, bread and butter (Linaria vulgaris)
Linaria vulgaris
Common Names butter and eggs, bread and butter
Family Figwort or Snapdragon
Flower Color Yellow
Plant Type Herb
Location McCall
Native No
Weed Noxious, Yes
Purple Loosestrife (Lythrum salicaria)Lythrum salicaria
Common Names purple loosestrife
Family Loosestrife
Flower Color Purple
Plant Type Herb
Native No
Weed Noxious
Palmer's penstemon(Penstemon palmeri)Penstemon palmeri
Common Names Palmer's penstemon
Family Figwort or Snapdragon
Flower Color White-pale pink
Plant Type Herb
Native No
Weed No
bouncingbet, soapwort (Saponaria officinalis)
Saponaria officinalis
Common Names bouncingbet, soapwort
Family Pink
Flower Color White-pale pink
Plant Type Herb
Short Description European origin, escaped as a weed, toxic to livestock but seldom consumed.
Native No
Weed Yes
salt cedar, tamarisk (Tamarix parviflora)
Tamarix parviflora
Common Names salt cedar, tamarisk
Family Tamarisk
Flower Color White-pale pink/ Purple
Plant Type Tree
Native No
Weed Yes
Common Tansy (Tanacetum vulgare)Tanacetum vulgare
Common Names common tansy
Family Composites, Sunflower
Flower Color Yellow
Plant Type Herb
Native No
Weed Noxious
dandelion (Taraxacum officinale)
Taraxacum officinale
Common Names dandelion
Family Composites, Sunflower
Flower Color Yellow
Plant Type Herb
Location McCall
Native No
Weed Yes
Red Clover (Trifolium pratense)
Trifolium pratense
Common Names red clover
Family Legume or Pea
Flower Color Pink
Plant Type Herb
Location McCall
Native No
Weed No
Mullein (Verbascum thapsus)Verbascum thapsus
Common Names common mullein
Family Figwort or Snapdragon
Flower Color Yellow
Plant Type Herb
Location McCall
Native No
Weed Can be

For additional information please send an e-mail request to:
Dr. Clinton C. Shock
Clinton.Shock@oregonstate.edu

Malheur Agricultural Experiment Station
595 Onion Avenue
Ontario, OR 97914
(541) 889-2174
FAX (541) 889-7831

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