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Malheur Experiment Station
Oregon State University

Plants by Scientific Name where Weed includes Noxious


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Dogbane, spreading dogbane (Apocynum androsaemifolium)Apocynum androsaemifolium
Common Names spreading dogbane, dogbane
Family Dogbane
Flower Color Pink
Plant Type Herb
Short Description Poisonous juice.
Native Yes
Weed Noxious
hemp dogbane (Apocynum cannabinum L.)Apocynum cannabinum L.
Common Names hemp dogbane
Family Dogbane
Flower Color White
Weed Noxious
hoary cress, whitetop (Cardaria spp.)
Cardaria spp.
Common Names hoary cress, whitetop
Family Mustard
Flower Color White
Plant Type Herb
Native No
Weed Noxious
blue mustard, tenella mustard, purple mustard (Chorispora tenella)
Chorispora tenella
Common Names blue mustard, tenella mustard, purple mustard
Family Mustard
Flower Color blue - purple
Plant Type Forb
Introduced Yes
Weed Noxious
water hemlock (Cicuta douglasii)Cicuta douglasii
Common Names water hemlock
Family Parsley
Flower Color White
Plant Type Herb
Short Description Poisionous plant, wet soil. Leaves: 1-3 times pinnate
Location McCall
Weed Noxious
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
Flixweed (Descurainia sophia)
Descurainia sophia
Common Names flixweed
Family Mustard
Flower Color Yellow
Plant Type Forb
Weed Noxious
Kochia (Kochia scoparia)


Kochia scoparia
Common Names kochia
Family Goosefoot
Plant Type Forb
Weed Noxious
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
Scotch thistle (Onopordum acanthuim) Onopordum acanthium
Common Names Scotch thistle
Family Composites, Sunflower
Flower Color Purple
Plant Type Forb
Weed Noxious
Common Tansy (Tanacetum vulgare)Tanacetum vulgare
Common Names common tansy
Family Composites, Sunflower
Flower Color Yellow
Plant Type Herb
Native No
Weed Noxious

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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