Found this great kickstarter project from 2011. They wanted to do ground source mapping of the return of wildflowers to the City of Detroit due to the increase of abandoned lots. How interesting!!
Here is an Huffington Post article on the project: Wildflowers of Detroit Smartphone App
More information from the website:
Wildflowers of Detroit ??A link to one of the creators Tumblr Site.
All Images from Wildflowers of Detroit