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IPM1023, Missouri Weed Seeds

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Missouri Weed Seeds

Asclepiadaceae (Milkweed family)

Broadleaf plant family

All members of this plant family are known as milkweeds. There are at least 15 species of milkweeds that occur in the state.

Cocklebur, common Cocklebur, common
Xanthium strumarium
 

Dandelion Dandelion
Taraxacum officinale
 

Dock, prairie Dock, prairie
Silphium terebinthinaceum
 

Eclipta Eclipta
Eclipta prostrata
 

Galinsoga, hairy Galinsoga, hairy
Galinsoga ciliata
 

Goldenrod, CanadaGoldenrod, Canada
Solidago canadensis
 

Goldenrod, tall Goldenrod, tall
Solidago altissima
 

Groundsel, common Groundsel, common
Senecio vulgaris
 

Horseweed Horseweed
Conyza canadensis
 

Ironweed, tall Ironweed, tall
Vernonia altissima
 

Ironweed, western Ironweed, western
Vernonia baldwinii
 

Lettuce, prickly Lettuce, prickly
Lactuca serriola
 

Lettuce, tall Lettuce, tall
Lactuca canadensis
 

Milkweed, common Milkweed, common
Asclepias syriaca
 

Milkweed, eastern whorled Milkweed, eastern whorled
Asclepias verticillata
 

Milkweed, green Milkweed, green
Asclepias hirtella
 

Milkweed, honeyvine Milkweed, honeyvine
Ampelamus albidus
 

Ragweed, common Ragweed, common
Ambrosia artemisiifolia
 

Ragweed, giant Ragweed, giant
Ambrosia trifida
 

Ragweed, lanceleaf Ragweed, lanceleaf
Ambrosia bidentata
 

Rosinweed, cup Rosinweed, cup
Silphium perfoliatum
 

Rosinweed, wholeleaf Rosinweed, wholeleaf
Silphium integrifolium
 

Salsify, western Salsify, western
Tragopogon dubius
 

Snakeroot, white Snakeroot, white
Eupatorium rugosum
 

Sowthistle, annual Sowthistle, annual
Sonchus oleraceus
 

Sowthistle, spiny Sowthistle, spiny
Sonchus asper
 

Spanishneedles Spanishneedles
Bidens bipinnata
 

Sunflower, common Sunflower, common
Helianthus annuus
 

Thistle, bull Thistle, bull
Cirsium vulgare
 

Thistle, Canada Thistle, Canada
Cirsium arvense
 

Thistle, field Thistle, field
Cirsium discolor
 

Thistle, musk Thistle, musk
Carduus nutans
 

Thistle, Scotch Thistle, Scotch
Onopordum acanthium
 

Thistle, tall Thistle, tall
Cirsium altissimum
 

For an idea of relative seed size, each photograph contains a millimeter ruler. The distance between increments is 1 mm.

 

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IPM1023 Missouri Weed Seeds | Page 9 | University of Missouri Extension