Someone posited that Dogpatch is named after “dog fennel,” with the related imagining that it used to grow wild here. Perhaps they were confused by the feral (but non-native) fennel growing here — or perhaps they are some sort of horticultural archaeologist and have knowledge of non-indigenous plants that were introduced and then subsequently stamped out.
There are three different plants that people call dog fennel: “Anthemis cotula,” “Chamaemelum mixtum,” and “Eupatorium capillifolium.” Of the three, the anthemis is the one linked to in the wikipedia article.
Here are some videos showing different kinds of dog fennel:
Here is a video showing what regular fennel looks like: