Thanksgiving Farmshttp://thanksgivingfarmandgarden.com/ is a 57-acre family-run farm in Adamstown, MD. We have a 40+ greenhouse operation. Specializing in the unusual, CSA, produce, and orchard.
They recently shared this photo and warning on their Facebook page:
"Cat-nap -- it's very invasive. Grows in sun or shade depending on the season. You don't plant it, it plants itself and that is usually on the most expensive flower in your garden and/or container. Hungry feeder and likes lots of water. Has briars/claws. Also comes in Dog-nap. This variety is much larger, with more destruction. The Dog-nap has a tendency to uproot vegetation in order to plant it's self. Both can/should be transplanted indoors to overwinter."