Biennials and Perennials

Which are differences between common milkweed and hemp dogbane?
Hemp Dogbane does not have milky sap
Common milkweed has yellow flowers and Hemp Dogbane has white
Common milkweed has opposite leaves while hemp dogbane has alternative leaves.
Hemp Dogbane has longer, slender pods than common milkweed.
Hemp Dogbane has longer, slender leaves than common milkweed.
Which of these is Curly dock?
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Which of the following plants is burdock?
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Which of these cannot get over 6ft tall?
Giant ragweed
Yellow rocket
Burdock
White cockle
Which of these is yellow rocket?
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Which of these are field bindweed ?
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What perennial weed is this?
Broadleaf Plantain
Horsenettle
Curly Dock
Burdock
Which thistle is this? hint: it has no hairs
Canada Thistle
Musk Thistle
Plumeless Thistle
Bull Thistle
Which thistle is this?
Canada Thistle
Musk Thistle
Plumeless Thistle
Bull Thistle
Which thistle is this? Hint: Upper of leaves tends not to be hairy but lower side on mature leaves can be.
Canada Thistle
Musk Thistle
Plumeless Thistle
Bull Thistle
Which thistle is this?
Canada Thistle
Musk Thistle
Plumeless Thistle
Bull Thistle
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