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
Xanthium strumarium
Dandelion
Taraxacum officinale
Dock, prairie
Silphium terebinthinaceum
Galinsoga, hairy
Galinsoga ciliata
Goldenrod, Canada
Solidago canadensis
Goldenrod, tall
Solidago altissima
Groundsel, common
Senecio vulgaris
Ironweed, tall
Vernonia altissima
Ironweed, western
Vernonia baldwinii
Lettuce, prickly
Lactuca serriola
Lettuce, tall
Lactuca canadensis
Milkweed, common
Asclepias syriaca
Milkweed, eastern whorled
Asclepias verticillata
Milkweed, green
Asclepias hirtella
Milkweed, honeyvine
Ampelamus albidus
Ragweed, common
Ambrosia artemisiifolia
Ragweed, giant
Ambrosia trifida
Ragweed, lanceleaf
Ambrosia bidentata
Rosinweed, cup
Silphium perfoliatum
Rosinweed, wholeleaf
Silphium integrifolium
Salsify, western
Tragopogon dubius
Snakeroot, white
Eupatorium rugosum
Sowthistle, annual
Sonchus oleraceus
Sowthistle, spiny
Sonchus asper
Spanishneedles
Bidens bipinnata
Sunflower, common
Helianthus annuus
Thistle, Canada
Cirsium arvense
Thistle, field
Cirsium discolor
Thistle, Scotch
Onopordum acanthium
Thistle, tall
Cirsium altissimum
For an idea of relative seed size, each photo contains a millimeter ruler. The distance between increments is 1 mm.