I guess I assume anybody on the garden threads would recognize “TPI”. I don’t know what plant experts actually call it on leaves & Dad’s long gone. (He would know.) Serrations per inch?
Toothed evidently but without spacing given. I see toothed in my Wild Edibles of Missouri book plus description of poison ivy on wikipedia.
They probably don’t give spacing because it varies by the size of the leaf even on a single plant. I know that book like many plant books has illustrations. I think descriptors like alternate or opposite leaves, number of leaves on leaflet and most of all flower color and description are the things used to ID a plant.
No more rain here and I doubt the .011 inch was even enough to rinse the dust off the leaves on the sides of the gravel road.