Knowledgebase
Sticky droppings from tree #791065
Asked May 16, 2022, 2:11 PM EDT
Kalamazoo County Michigan
Expert Response
We had an earlier question a few days ago on this very subject. MSU Extension’s Diane Brady identified them as coming from the cottonwood tree.
“These appear to be the seed husks from a nearby cottonwood. These trees bud out in early spring and then as the seeds ripen, the brown resinous leaf-bud scales are shed and stick to your shoes and dog's feet. While messy for a while they will eventually dry up and not be as sticky. You could possibly rake them up in the areas where you walk. .
These [husks] may be coming from a tree in your yard or somewhere in your neighborhood. See how to identify a cottonwood tree from the link below. Hope that helps.”
https://snr.unl.edu/data/trees/identification/basictree.aspx?sid=71
https://dendro.cnre.vt.edu/dendrology/syllabus/factsheet.cfm?ID=64