I was in the woods and these "plants" got stuck to my polo shirt.. they're like velcro. I got the big pieces out but there's still like a hundred smaller pieces which would take forever to take out. Is there an easier way to take them out?

Try shaving your shirt with a safety razor. Put the "to be shaved surface" on a flat and smooth base to prevent cuts to the shirt. I used this technique to remove the dingle balls from sweaters back when they were in style. At this point you don't have much to lose.

Hey thanks for the advice. It helped a lot.

What about using one of those sticky lint rollers that they sell for dress clothes? That may help, unless they are really stuck on there. Or if you have an air compressor, you can always put it to about 50 psi, put on an air blower nozzle, and put the nozzle inside the shirt and blow the stuff out from the inside on out. Sounds crazy, but I've actually done that before with good results.