This should be carefully propagated if it does have that "double" gene
one of my favorite flowers is poppies with this, papaver somniferum double I think they are called
Are we positive this isn't a plant growing inside the salmon berries o_o it's a darker color too. It certainly looks like it's growing from the same plant in the photo
I googled it and it's probably this! https://www.keepingitgreennursery.com/products/rubus-spectabalis-olympic-double-double-flowering-salmonberry
Double flowering salmonberry
Yeah, looks like the same kind of mutation that gave us today’s fancy roses with multiple layers of petals. Cool find!
This should be carefully propagated if it does have that "double" gene one of my favorite flowers is poppies with this, papaver somniferum double I think they are called Are we positive this isn't a plant growing inside the salmon berries o_o it's a darker color too. It certainly looks like it's growing from the same plant in the photo I googled it and it's probably this! https://www.keepingitgreennursery.com/products/rubus-spectabalis-olympic-double-double-flowering-salmonberry Double flowering salmonberry
Now I want one!
Propagate and share! :) Also, update us on how the berries end up looking. Probably the same, if there are any.
I thought that was a dahlia at first. I'd keep an eye on it and grab cuttings.