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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
Yellow Beeplant (Cleome lutea)Cleome lutea
Common Names yellow beeplant, yellow spiderflower
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
Native Yes
Weed Can be
alkali saltgrass (Distichlis stricta )Distichlis stricta
Common Names alkali saltgrass
Family Grass
Plant Type Grass
Short Description
Native Yes
Weed Can be
wild cucumber (Echinocystis lobata)Echinocystis 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
Western Juniper (Juniperus occidentalis)Juniperus occidentalis
Common Names western juniper
Family Cypress
Plant Type Tree
Location McCall
Native Yes
Weed Can be
Birds Foot Trefoil (Lotus Corniculatus)Lotus corniculatus
Common Names bird's-foot trefoil
Family Legume or Pea
Flower Color Yellow
Plant Type Herb
Native No
Weed Can be
Wild Crab Apple (Peraphyllum ramosissimum)Peraphyllum ramosissimum
Common Names wild crabapple, squaw apple, wild crab apple
Family Rose
Native No, Yes
Weed Can be
silverleaf phacelia(Phacelia hastata)Phacelia hastata
Common Names silverleaf phacelia
Family Waterleaf
Flower Color Green, Red
Plant Type Forb
Location McCall and many locations
Native Yes
Weed Can be
bulbous bluegrass (Poa bulbosa)
Poa bulbosa
Common Names bulbous bluegrass
Family Grass
Flower Color Green
Plant Type Grass
Native No
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
white clover, ladino clover, Dutch clover (Trifolium repens)Trifolium repens
Common Names ladino clover, white clover, Dutch clover
Family Legume or Pea
Native No
Weed Can be
Stinging Nettle (Urtica dioica)

Urtica dioica
Common Names stinging nettle
Family Nettle
Flower Color Green
Plant Type Forb
Location McCall and many locations
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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