I have a Loganberry, the older original kind with thorns. The thorns are not bad though.
It is a kind of BLACKBERRY which has Raspberry ancestry in it.
It is one of my favorite berries of all! If picked a touch early it tastes like a blackberry, and is still slightly reddish. Picked just right it is kind of purplish colored. The berry slips out almost like a raspberry, but bleeds juice, yummy. Picked just right like that it has that subtle raspberry flavor. Picked a bit late it is about as black as a blackberry, but begins to go bland, but sweet.
My old version grows similar to a boysenberry. floppy viney, and should be staked up. It does not spread wildly. In fact, I set 2 canes into the ground to get more plants, tip layer fashion. Seems to be taking. I also buried some of the prunings and seems to be new growth coming up there. Fingers crossed.
It seems hardy as can be here in barely zone 8, and this was a zone 7 winter, and made no difference on it.
I hear tell there is a thornless version that grows nicely upright.
The berries are good sized, long and conical, but not the most uniform.
Right now for the first to flower race, looks like Boysenberry will be first to flower by only a couple days.
I HIGHLY RECOMMEND LOGANBERRIES!