Silphium perfoliatum?

NOT Silphium perfoliatum.

Why not laceyvail?

Any other suggestions? I'm not seeing any suggestions so far as a match. Thanks,

Can you show a photo of where the leaves join the stem?

Sorry, I was on vacation. No other photo.

I've asked the place where I saw it to help with a photo.

My Silphium perfoliatum just now. You don't notice any similarities?

AFAIK no other species on the planet looks similar to your plant.

I do now. When I loked online, most were full flowering and with widely spaced leaves as a rsult. Thanks!

You're welcome!

You sure it's a cultivated plant? It sure looks like a well nourished weed. And I don't mean the "the right plant in the wrong place" kind of weed.

Doesn't look anything like my Cup Plant !

Signet, how about showing us a photo of your 'cup plant' for comparison. I've been cultivating this behemoth so yes it's definitely cultivated plant.

yes i can see youve been taking it to plant perfection. i meant did you aquire it? Many of us have babied a plant that was so green and healthy that it could not possibly be a weed, but it was.

Jay’s plant is a Cup Plant and the OP’s plant is as well.

tj

Marie Tulin. The past is blurry, but I think the cup Plant seed hitchhiked in a batch of Rudbeckia seeds, Rudbeckia submentosa var. deamii, or something similar sounding. For a long time I thought I was nursing a vigorous Rudbeckia, but at some point I realized something was terribly wrong and it was a silphium. Rudbeckia laciniata is another monster plant, but I thought that I was cultivating something akin to Rudbeckia fulgida. I felt like I wasn't ready to take on something so large, but I kept it anyway, and I'm glad I did. It seems to have expanded even more this year and is nudging up to a couple of other perennials. It's fun to watch pollinators drink from the cups, and birds using them to bathe. They can get damaged by high winds in the garden. In the prairie they are more protected, by nearby plants. This year I'm adding the rest of the Silphium species native to my area, compass plant, prairie dock, and rosinweed. People grow elephant ears and castor beans so these are in that same category of big and bold. I do nurture some weeds until they get big enough to ID.

Maybe this Silphium looks congested because it's growing up against a building in what looks like a narrow strip? That's cruelty to plants, to have something that majestic crammed into a confined space.