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Troublesome Invaders of the Western US and Canada: M-Z

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Malta Starthistle

Malta starthistle
(Centaurea melitensis)


Species Identification and Characteristics

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Meadow Hawkweed

Meadow hawkweed
(Hieracium caespitosum)

Also known as: Yellow hawkweed

Species Identification and Characteristics

Management and Control Resources

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Meadow knapweed
(Centaurea pratensis, C. x moncktonii)


Species Identification and Characteristics

Management and Control Resources

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mediterranean sage

Mediterranean sage
(Salvia aethiopis)

Also known as: African sage

Species Identification and Characteristics

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medusahead

Medusahead
(Taeniatherum caput-medusae)

Also known as: Medusarye

Species Identification and Characteristics

Management and Control Resources

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Musk thistle

Musk thistle
(Carduus nutans)

Also known as: Nodding thistle, Nodding plumeless thistle

Species Identification and Characteristics

Management and Control Resources

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Orange hawkweed

New Zealand mudsnail
(Potamopyrgus antipodarum)


Resources

Videos

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Orange hawkweed

Orange hawkweed
(Hieracium aurantiacum)

Also known as: Orange paintbrush, Devil's weed, Missionary weed, Devil's paintbrush

Species Identification and Characteristics

Management and Control Resources

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Oxeye daisy

Oxeye daisy
(Chrysanthemum leucanthemum, Leucanthemum vulgare)


Species Identification and Characteristics

Management and Control Resources

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Perennial pepperweed

Perennial pepperweed
(Lepidium latifolium)

Also known as: Tall whitetop, Broadleaved peppergrass, Giant whiteweed, Ironweed, Virginia pepperweed

Species Identification and Characteristics

Management and Control Resources

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Perennial sowthistle

Perennial sowthistle
(Sonchus arvensis)

Also known as: Creeping sowthistle, Gutweed, Field milk thistle, Field sowthistle

Species Identification and Characteristics

Management and Control Resources

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Phragmites

Phragmites
(Phragmites australis)

Also known as: Common reed

Species Identification and Characteristics

Management and Control Resources

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Plumeless thistle

Plumeless thistle
(Carduus acanthoides)

Also known as: Spiny plumeless thistle, Bristly thistle

Species Identification and Characteristics

Management and Control Resources

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Poison hemlock

Poison hemlock
(Conium maculatum)

Also known as: Deadly hemlock, Poison parsley, Poison fool's parsley

Species Identification and Characteristics

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Puncturevine

Puncturevine
(Tribulus terrestris)

Also known as: Goathead, bullhead, Mexican sandbur, Texas sandbur

Species Identification and Characteristics

Management and Control Resources

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Purple loosestrife

Purple loosestrife
(Lythrum salicaria)

Also known as: Purple lythrum, Rainbow weed, Spiked loosestrife

Species Identification and Characteristics

Management and Control Resources

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Quackgrass

Quackgrass
(Agropyron repens, Elymus repens, Elytrigia repens)

Also known as: Creeping wild rye, Couch grass, Dog grass, Quitch, Twitch

Species Identification and Characteristics

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Rush skeletonweed

Quagga mussel
(Dreissena rostriformis bugensis)


Resources

Videos

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Rush skeletonweed

Rush skeletonweed
(Chondrilla juncea)

Also known as: Skeletonweed, Hogbite

Species Identification and Characteristics

Management and Control Resources

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Russian knapweed

Russian knapweed
(Acroptilon repens, Centaurea repens)

Also known as: Mountain bluet, Turkestan thistle

Species Identification and Characteristics

Management and Control Resources

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Russian olive

Russian olive
(Elaeagnus angustifolia)

Also known as: Oleaster

Species Identification and Characteristics

Management and Control Resources

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Saharan mustard

Saharan mustard
(Brassica tournefortii)

Also known as: African mustard

Species Identification and Characteristics

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Saltcedar complex

Saltcedar complex
(Tamarix spp.)

Also known as: Tamarisk

Species Identification and Characteristics

Management and Control Resources

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Scentless chamomile

Scentless chamomile
(Tripleurospermum perforatum, Matricaria perforata)

Also known as: False chamomile

Species Identification and Characteristics

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Scotch broom

Scotch broom
(Cytisus scoparius)


Species Identification and Characteristics

Management and Control Resources

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Scotch thistle

Scotch thistle
(Onopordum acanthium)

Also known as: Cotton thistle, Scotch cotton thistle, Heraldic thistle

Species Identification and Characteristics

Management and Control Resources

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Sericea lespedeza

Sericea lespedeza
(Lespedeza cuneata)

Also known as: Chinese lespedeza, Chinese bush clover, Himalayan bush clover, Hairy lespedeza

Species Identification and Characteristics

Management and Control Resources

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Silverleaf nightshade

Silverleaf nightshade
(Solanum elaeagnifolium)

Also known as: White horsenettle, Silverleaf bitter apple, Tomato weed, Prairie berry, Desert nightshade

Species Identification and Characteristics

Management and Control Resources

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Skeletonleaf bursage

Skeletonleaf bursage
(Ambrosia tomentosa)

Also known as: Silverleaf povertyweed

Species Identification and Characteristics

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Smooth cordgrass

Smooth cordgrass
(Spartina alterniflora)

Also known as: Spartina

Species Identification and Characteristics

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Spotted knapweed

Spotted knapweed
(Centaurea maculosa, C. biebersteinii)


Species Identification and Characteristics

Management and Control Resources

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Squarrose knapweed

Squarrose knapweed
(Centaurea virgata, C. squarrosa, C. triumfettii)


Species Identification and Characteristics

Management and Control Resources

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St. Johnswort

St. Johnswort
(Hypericum perforatum)

Also known as: Klamathweed, Goatweed

Species Identification and Characteristics

Management and Control Resources

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Sulfur cinquefoil

Sulfur cinquefoil
(Potentilla recta)

Also known as: Roughfruit cinquefoil

Species Identification and Characteristics

Management and Control Resources

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Syrian beancaper

Syrian beancaper
(Zygophyllum fabago)


Species Identification and Characteristics

Management and Control Resources

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Tansy ragwort

Tansy ragwort
(Senecio jacobaea)

Also known as: Common ragwort, Stinking Willie, Tansy butterweed

Species Identification and Characteristics

Management and Control Resources

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Toothed spurge

Toothed spurge
(Euphorbia dentata)

Also known as: Green poinsettia

Species Identification and Characteristics

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Water hyacinth

Water hyacinth
(Eichhornia crassipes)

Also known as: Common water hyacinth

Species Identification and Characteristics

Management and Control Resources

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Whitetop

Whitetop
(Cardaria draba)

Also known as: Hoary cress, Peppergrass, Whiteweed

Species Identification and Characteristics

Management and Control Resources

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Wild proso millet

Wild proso millet
(Panicum miliaceum)

Also known as: Panic millet, Proso, Broom-corn millet

Species Identification and Characteristics

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Yellowflag iris

Yellowflag iris
(Iris pseudacorus)

Also known as: Yellow iris, Pale yellow iris, Water flag

Species Identification and Characteristics

Management and Control Resources

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Yellow starthistle

Yellow starthistle
(Centaurea solstitialis)

Also known as: St. Barnaby's thistle, Yellow cockspur

Species Identification and Characteristics

Management and Control Resources

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Yellow toadflax

Yellow toadflax
(Linaria vulgaris)

Also known as: Butter-and-eggs, Wild snapdragon, Common toadflax

Species Identification and Characteristics

Management and Control Resources

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Zebra mussel

Zebra mussel
(Dreissena polymorpha)


Resources

Videos



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