---------------------...there are a lot of edible wild fruits around us, Liis - which in fact do not taste as if they'd be...
Another example I remember is the wild apple Malus sylvestris
which nowadays in Germany is used as a decorative tree along small-traffic streets. Nevertheless, it's edible in cooked or dried form, and perhaps contents more healthy substances than some modern cultivated apple.
But who does know this??http://et.wikipedia.org/wiki/Mets-õunapuu is only a poor translation in eesti keeles - think it is not known in Estonia.
No problem about the R. nessensis blackberry taste actually - it tastes (probably) just as it should, being the species it is. Which seems to be one explanation of the very different opinions of blackberry culinary value
. Apart from factors such as sunshine, habitat etc., etc. In Sweden the R. plicatus has been named "sweet blackberry". - It is simply interesting that a species has developed so differently in so nearby countries. The species, subspecies and what-not are a truly tangled web, btw, subject of several doctoral theses!
Mets-õunapuu, "forest or wild apple tree" is quite OK; it might of course be called "metsik õunapuu", wild apple tree, but I think that would tend to suggest naturalised apple tree.
And yes, they do exist in Estonia. Only the genetics and precise origins of today's "wild" apple trees are probably highly complicated and somewhat mixed up!
PS. Sorry if I have missed in translations that the correct English name of Malus sylvestris is Crab apple
Sometimes I hope that I know, and don't check ...