Photo will be attached (GW gods allowing).
This is delphinium tricorne, which is native here in Arkansas. This one is in either my third or fourth year in my garden and this is the first flowering. It's rather hard to find and a little on the finicky side. It failed to thrive in my Oklahoma garden, but appears to be reluctantly growing here. Most delphiniums take one long look at our summer and say 'Outta here' and croak. The three I've had luck with so far is exaltatum, tricorne, and treleasei.
In Oklahoma, I had natively occurring D. carolinianum virescens, but it doesn't like the overly abundant summer soil moisture here and abruptly departed when planted last year.