Seems as if several of us artists in the Midwest have sketched sticky, insistent Galium/bedstraw/cleavers recently!
Here's Jeanette's: http://www.flickr.com/photos/longears/3557941230/
I did this quick ink sketch on our recent sketchcrawl...
....and added color on the spot, since I already had greens mixed up for my previous sketch. These crazy things stick to your clothes, your shoes, your pets, and anything else they come in contact with.
I believe they were once dried and used to stuff mattress ticks (a thick cloth bag, not the critter that gives you Lyme disease), hence one of their common names, bedstraw.