Normally I see yellows which have one or just a few thicker flower spikes. This guy has many spikes, though. I think I might have gotten this from Calalily....What is it, please? It's BIG and quite robust! Will it self-seed everywhere since I didn't deadhead it? *gasp*
Can't really tell from the pic but it looks like Verbascum chaixii Nettle Leaved Mullein.
Could it be V. olympicum? The large, tight head. Possibly the flowers are a bit past it.
V olympicum is a huge plant reaching 6 feet or more with a very thick usually single flower stem
This has many small flower spikes arising from each stalk. I believe the V. olympicum is what I see growing along the railroad tracks near my MIL's home, come to think of it. It almost looks like big ears of husked golden corn when it first starts to bloom.