Don, it looks similar to double growths Iâve seen on daylilies and coneflowers, and a few other plants. Iâve read that this occurs as a chance mutation, but I suppose it could produce more like it.

I found this interesting:

âThe cattail has a double flower, in which the top part, the male flower, pollinates the bottom, the female. Male cattail flowers produce pollen at about the summer solstice, or midsummer. You can tell when this is because the corncob-like male flower turns yellow with pollen. When the plants are pollinated, the male part of the flower dies and falls off.â

Maybe yours are on a double date.

Kitty

A friend of mine showed me this two-tier cattail.  I donât ever recall seeing something like this.  Is this common.  He says there is a whole clump of this, so apparently, it is not just a single fluke.

Don Martinson🌿 
Veni, vidi, plantam emi
(I came, I saw, I bought  plant.)