source: CUPIC

American wild mint looks very, very similar to introduced M. arvensis. This one was in Ontario, Canada

Read more about American wild mint looks very, very similar to introduced M. arvensis. This one was in Ontario, Canada

Note leaf hairs. Taken in Romania, native to Europe

Read more about Note leaf hairs. Taken in Romania, native to Europe

Solomon's plume can carpet the forest north of the Finger Lakes. (Ontario, Canada)

Read more about Solomon's plume can carpet the forest north of the Finger Lakes. (Ontario, Canada)

Flower of cucumber magnolia, cultivated in Ontario Canada.

Read more about Flower of cucumber magnolia, cultivated in Ontario Canada.

Cucumber magnolia, cultivated in Ontario Canada.

Read more about Cucumber magnolia, cultivated in Ontario Canada.

Note the distinctive lupine leaves. (Ontario Canada)

Read more about Note the distinctive lupine leaves. (Ontario Canada)

Fruit is a cluster of samaras. Fall leaf color in background. (Univ. of Guelph Arboretum, Ontario CA)

Read more about Fruit is a cluster of samaras. Fall leaf color in background. (Univ. of Guelph Arboretum, Ontario CA)

Notice the leaf shape. Taken in Jackson Co. Illinois

Read more about Notice the leaf shape. Taken in Jackson Co. Illinois

The distinctive flower of tulip tree in Jackson Co IL. Note insects for size.

Read more about The distinctive flower of tulip tree in Jackson Co IL. Note insects for size.

slender path rush, Illinois

Read more about slender path rush, Illinois