This is the plant that while it was blooming, I had mistaken for yellow star-thistle. There are large patches of tocalote inside the National Park and almost no yellow star-thistle (thanks to an aggressive targeted weed management program). What made me realize I had been mistaking this ID is that while I was hiking past it, it dawned on me that it didn't hurt as much as I thought it should if it were yellow star-thistle. No kidding. I'm apparently not the only one who mistakes the two related plants, because Anna Bennett did a nice job comparing the two on CalPhotos: here, here, and here.