Jerusalem Artichoke

Helianthus tuberosus
Montcalm County, October 3, 2008
Montcalm County, October 3, 2008
Montcalm County, October 3, 2008
Montcalm County, October 3, 2008
Notice in the above image that the lower leaves are opposite.
Montcalm County, October 3, 2008