There are a number of Oenothera species native to Michigan, many of which have yellow flowers but, to my eye, none appear to have the same leaf shape and arrangement as Oenothera flava.
If you believe you've found this plant growing in Michigan, you might consult your state's native plant society to get some experienced botanists to look at it as well. If your identification is confirmed, you can report your finding to the USDA Plants Database and request that the plant's range be updated.
How will winter weather affect bluebonnets this year? February 27, 2010 - Just wondering how our winter weather this year will affect the blooming of bluebonnets. When are they expected to be in full bloom and what will be their duration?
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Current forecast for wildflowers from Colorado Springs February 24, 2012 - What is your current forecast for wildflowers this spring? view the full question and answer
Meadow planting on a shale slope with shallow soil in NY March 04, 2010 - Need to elaborate on my previous question which I am sure will produce a different response. We have a very large slope, near the top of a very long driveway, that is in a sunny location and comprise... view the full question and answer
Smarty Plants on earliest blooming wildflowers November 19, 2004 - For Spring, what are the earliest blooming wild flowers and when do they typically bloom?
I know it's terribly early to be predicting these things, but any idea if the 2005 Bluebonnet crop in Austi... view the full question and answer