A better name now is probably Why Berry 
Developed at Univ of Maryland. ‘A hardier form of tayberry’
Your review and your talks on houzz, fig groups and here are the only real talk about Wyeberries that exist.
I made it as far as to contact the breeder HarryJan Swartz and found a dead end.
Wye in the name is from the Wye Research and Education Center, Queenstown, Md in case anyone wants to follow the trail.
Your review on this forum is likely the only review of this berry where you said they taste identical to Boysens.
So in my book its not worth chasing - i trust your review.
Which leads to Lavacaberry which i have discussed in the past years… according to Gary Pense Sr. and Charlie Little they are also Boysens…or at least identical to them. Perhaps they did not get the original strain… hard to know. But i think the truth is that Lavacaberries are just Boysens that were grown in Arkansas. No sense chasing it at this time unless a new source comes up at a later date that changes the information.
Nectar Boysenberry- the one willis sells is not true to name and they are lying. They sell thornless boysen and label it as nectar boysenberry. Nectar: Originated by Howard G. Benedict in El Monte and introduced in 1937. Originally said to have been a seedling of Young, but later thought to be a chimera (mutation) of Boysen. The fruit is supposed to be larger than Boysen, and many claim it is sweeter. This plant is not available.
Ruby Boysen aka Newberry- Newberry: A complex hybrid blackberry involving Boysen, Marion, Logan and many other varieties, bred by Chad E. Finn of the USDA in Corvallis, Ore., and officially introduced this year. Originally selected for processing, it has seemed more promising for fresh sales, because the berries, somewhat redder and sweeter than Boysen, do not leak juice as readily. It is grown on 20 acres by Paul and Gayle Willems and two of their sons in Kingsburg, south of Fresno, and marketed as “Ruby Boysen” at their Berry Lady farm stand, and at Southern California retail stores. I have these plants available… im not sure if anyone else does.
Riwaka’s Choice Boysen- I am rooting it now. No clue how it will turn out and there is very little information on it other than it was bred in NZ to be a better boysen. New Zealanders have many many variations of Boysens and most are not released to the public.
Boysenberry Seedling #43 - I passed on this one… it is supposedly a little more vigorous than other boysens… and i think i have enough boysen variants to do me for now.
I can only wish to have this kind of climate…
