Silverberries are the fruit from a shrub native to the northern regions of North America, especially the Hudson’s Bay region.
These are consumed locally as they are too dry and mealy to be of much interest elsewhere.
Silverberries are closely related to the ancestor of the olive called “oleaster” (Elaeagnus angustifolius), which is eaten in Turkey and other Mediterranean countries.
After drying, the fruits are a pale brown and look something like small dates. A cultivar of the oleaster grows further to the east in Afghanistan and region. There are also other species that bear similar fruits in the Orient and Alaska.