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Malheur Experiment Station
Oregon State University

Plants by Scientific Name where Weed includes Can be


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fiddleneck (Amsinckia intermedia)
Amsinckia intermedia
Common Names fiddleneck
Family Borage
Flower Color Yellow or Purple
Plant Type Herb
Short Description Hay containing fiddleneck is poisonous to livestock
Weed Can be
showy milkweed (Asclepias speciosa)
Asclepias speciosa
Common Names showy milkweed
Family Milkweed
Flower Color Pink, purple
Plant Type Herb
Native Yes
Weed Can be
chicory (Cichorium intybus)
Cichorium intybus
Common Names chicory
Family Composites, Sunflower
Flower Color Blue
Plant Type Herb
Location McCall
Native No
Weed Can be
Yellow Beeplant (Cleome lutea)Cleome lutea
Common Names yellow beeplant
Family Caper
Flower Color Yellow
Plant Type Herb
Native Yes
Weed Can be
rocky mountain beeplant (Cleome serrulata)
Cleome serrulata
Common Names rocky mountain beeplant
Family Caper
Flower Color Purple
Plant Type Herb
Weed Can be
wild cucumber (Echinoeysis lobata)
Echinoeysis lobata
Common Names wild cucumber
Family Cucurbit
Flower Color Cream white
Plant Type Vine
Native Yes
Weed Can be
curlycup gumweed (Grindelia squarrosa)
Grindelia squarrosa
Common Names curlycup gumweed
Family Composites, Sunflower
Flower Color Yellow
Plant Type Herb
Native Yes
Weed Can be
Sunflower (Helianthus annuus)
Helianthus annuus
Common Names sunflower
Family Composites, Sunflower
Flower Color Yellow
Plant Type Herb
Native Yes
Weed Can be
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
poverty sumpweed (Iva axillaris)Iva axillaris
Common Names poverty sumpweed
Family Composites, Sunflower
Plant Type Forb
Native Yes
Weed Can be
sheep sorrel (Rumex acetosella) 
Rumex acetosella
Common Names sheep sorrel
Family Buckwheat
Flower Color Pink, Yellow, Creamy White
Plant Type Herb
Location McCall
Weed Can be
Canada goldenrod (Solidago canadensis)
Solidago canadensis
Common Names Canada goldenrod
Family Composites, Sunflower
Flower Color Yellow
Plant Type Herb
Location McCall
Native Yes
Weed Can be
poison ivy (Toxicodendron rydbergii)
Toxicodendron rydbergii
Common Names poison ivy
Family Sumac
Plant Type Shrub
Native Yes
Weed Can be
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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