Himalayan blackberry is a very hardy, over-wintering wild berry that was introduced in the mid-19th century for this purpose (to make jam and for pollination of other blackberries). It has spread rapidly, and now covers nearly 1 million acres of forested mountain slopes and is capable of outcompeting native species.
Himalayan blackberry photos:
![Himalayan Blackberry (Rubus armeniacus) in Seattle [OC] - The berries are very edible but this is an invasive specie… - Blackberry plants, Berries, Invasive species](/images/HimalayanBlackberry-Rubusarmeniacus-inSeattle-OC--Theberriesareveryediblebutthisisaninvasivespecie--Blackberryplants_Berries_Invasivespecies.jpg)
