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Malheur Experiment Station
Oregon State University

Plants by Scientific Name where Introduced includes Yes


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velvetleaf (Abutilon theophrasti )Abutilon theophrasti
Common Names velvetleaf
Family Mallow
Flower Color Yellow
Plant Type Shrub
Short Description A large, aggressive annual weed.
Introduced Yes
Native No
Weed Noxious
Russian knapweed (Acroptilon repens)
 Acroptilon repens
Common Names Russian knapweed, hardheads
Family Composites, Sunflower
Flower Color Pink, rose
Plant Type Shrub
Introduced Yes
Native No
Weed Noxious, Yes
creeping bentgrass(Agrostis stolonifera)Agrostis stolonifera
Common Names creeping bentgrass
Family Grass
Plant Type Grass
Short Description An introduced weed, sometimes used for lawns.
Introduced Yes
Weed Yes
Tumble pigweed (Amaranthus albus)Amaranthus albus
Common Names tumble pigweed
Family Amaranth
Flower Color Green
Plant Type Herb
Short Description Amaranthus albus, tumble pigweed
Introduced Yes
Weed
forage kochia(Bassia prostrata)Bassia prostrata
Common Names forage kochia
Family Goosefoot
Flower Color Green, Red
Introduced Yes
Native No
Weed No
black mustard (Brassica nigra)Brassica nigra
Common Names black mustard
Family Mustard
Flower Color Yellow
Plant Type Forb
Introduced Yes
Native No
Weed Yes
Cheat grass (Bromus tectorum)Bromus tectorum
Common Names cheat grass, downy brome
Family Grass
Flower Color Green
Plant Type Grass
Introduced Yes
Native No
Weed Yes
musk thistle (Carduus nutans)Carduus nutans
Common Names musk thistle
Family Composites, Sunflower
Flower Color Purple
Plant Type Forb
Introduced Yes
Weed Yes
rush skeletonweed (Chondrilla juncea)
Chondrilla juncea
Common Names rush skeletonweed
Family Composites, Sunflower
Flower Color Yellow
Plant Type Forb
Introduced Yes
Native No
Weed Yes
blue mustard, tenella mustard, purple mustard (Chorispora tenella)
Chorispora tenella
Common Names tenella mustard, purple mustard, blue mustard
Family Mustard
Flower Color blue - purple
Plant Type Forb
Introduced Yes
Native No
Weed Noxious
Jimsonweed (Datura stramonium)
Datura stramonium
Common Names Jimsonweed
Family Potato
Flower Color White/Purple
Plant Type Shrub
Introduced Yes
Native No
Weed Yes
Hairy crabgrass (Digitaria sanguinalis)Digitaria sanguinalis
Common Names hairy crabgrass
Family Grass
Plant Type Grass
Introduced Yes
Native No
Weed Yes
Barnyard grass (Echinochloa muricata) Echinochloa muricata
Common Names barnyard grass
Family Grass
Flower Color Green
Plant Type Grass
Introduced Yes
Native No
Weed Yes
leafy spurge (Euphorbia esula)Euphorbia esula
Common Names leafy spurge
Family Spurge
Flower Color Yellow
Plant Type Forb
Introduced Yes
Weed Yes
petty spurge (Euphorbia peplus)
Euphorbia peplus
Common Names petty spurge
Family Spurge
Plant Type Forb
Introduced Yes
Weed Yes
Halogeton (Halogeton glomeratus)Halogeton glomeratus
Common Names halogeton
Family Goosefoot
Flower Color Green-white
Plant Type Forb
Introduced Yes
Native No
Weed Yes
wild barley, mouse barley (Hordeum leporinum)Hordeum leporinum
Common Names mouse barley, hare barley, wild barley
Family Grass
Plant Type Grass
Introduced Yes
Native No
Weed Yes
prickly lettuce, compass plant (Lactuca serriola )
Lactuca serriola
Common Names prickly lettuce, compass plant
Family Composites, Sunflower
Flower Color Yellow
Plant Type Herb
Introduced Yes
Native No
Weed Yes
henbit, henbit deadnettle (Lamium amplexicaule)Lamium amplexicaule
Common Names henbit , henbit deadnettle
Family Mint
Flower Color Purple
Plant Type Forb
Introduced Yes
Weed Yes
perennial pepperweed (Lepidium latifolium L) 
Lepidium latifolium L
Common Names perennial pepperweed
Family Mustard
Flower Color White, cream
Plant Type Forb
Introduced Yes
Native No
Weed Noxious
white sweetclover (Melilotus alba)
Melilotus alba
Common Names white sweetclover
Family Legume or Pea
Flower Color White
Plant Type Forb
Introduced Yes
Native No
Weed Yes
yellow sweetclover (Melilotus officinalis )
Melilotus officinalis
Common Names yellow sweetclover
Family Legume or Pea
Flower Color Yellow
Plant Type Herb
Introduced Yes
Native No
Weed Yes
knot bindweed, black bindweed, ivy bindweed, climbing bindweed (Polygonum convolvulus)
Polygonum convolvulus
Common Names knot bindweed, black bindweed, ivy bindweed, climbing bindweed
Family Buckwheat
Plant Type Forb
Introduced Yes
Native No
Weed Yes
Common rye (Secale cereale)Secale cereale
Common Names common rye
Family Grass
Plant Type Grass
Introduced Yes
Native No
Weed Yes
Green foxtail (Setaria viridis)Setaria viridis
Common Names green foxtail
Family Grass
Flower Color Green, mixed
Plant Type Grass
Introduced Yes
Native No
Weed Yes
tall tumblemustard (Sisymbrium altissimum)Sisymbrium altissimum
Common Names tumble mustard, tall tumblemustard
Family Mustard
Flower Color Yellowish
Plant Type Forb
Introduced Yes
Native No
Weed Yes
hairy night shade (Solanum sarrachoides)Solanum sarrachoides
Common Names hairy night shade
Family Potato
Flower Color White
Plant Type Forb
Short Description There berries are Green, brown, and yellow when matured.
Introduced Yes
Native No
Weed Yes
medusahead rye (Taeniatherum caput-medusae)Taeniatherum caput-medusae
Common Names medusahead rye
Family Grass
Flower Color Green-yellow
Plant Type Grass
Introduced Yes
Native No
Weed Noxious
Puncturevine (Tribulus terrestris L.)Tribulus terrestris L.
Common Names puncturevine, goathead, Mexican sandbur, Texas sandbur, tackweed
Flower Color Yellow
Plant Type Forb
Introduced Yes
strawberry clover (Trifolium fragiferum ) Trifolium fragiferum
Common Names strawberry clover
Family Legume or Pea
Flower Color Light Pink
Plant Type Forb
Introduced Yes
Native No
Weed No
moth mullein (Verbascum blattaria)Verbascum blattaria
Common Names moth mullein
Family Figwort or Snapdragon
Flower Color White/Purple
Plant Type Herb
Introduced Yes
Native No
Weed Yes

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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