It’s high time we did a post on the mild-mannered cousin of the invasive blackberry we spend so much time trying to eradicate. Trailing blackberry is native to the northwest and also produces sweet berries from white to pink flowers. The smooth, thin, cylindrical stems have small thorns and a dull gray- green powdery coating, and trail delicately along the ground. The leaflets are toothed and split into three pointed leaflets.
These features set trailing blackberry apart from the invasive species, which have stiff, tall, arching, dark green stems with ridges and large thorns. The leaflets on the evergreen blackberry are deeply toothed and jagged-looking, on the Himalayan blackberry they are rounded. Both have five leaflets per leaf.
and take a look at the Himalayan and evergreen blackberry weed ID card to compare.