Range: Central and eastern North America. Blackberry vs Dewberry. To tell the difference between dewberries and blackberries, first look at the structure of the shrub. Flavor: bitter, not usually eaten. At a glance, dewberries are sometimes confused with blackberries, but each plant has its own unique features. Drupelet Color: Dark purple, almost black. Complete blackberry and dewberry eradication is difficult and will likely require multiple applications and/or tactics. Most of these berries are native to the Pacific Northwest, with the exception of dewberries, which grow throughout the eastern half of the United States. We usually make lots of jelly out of the berries, but we also made sure we have our fill of fresh berry pie while the season lasts. Northern Dewberry or Common Dewberry (Rubus flagellaris). Wild Blackberry or Dewberry Pie. Also known as: bristly dewberry, bristly groundberry, groundberry, hispid swamp blackberry or running swamp blackberry. A Dewberry is very similar to a Blackberry, but instead of growing on upright canes, it is a trailing plant - that is, it grows like a vine horizontally over the ground. They are little to medium-sized berries that grow on a blackberry bush. In its early days, the dewberry plant was derived from the blackberry plant, but it now has about 100 varieties of its own. In terms of shape, they are round when small, but become somehow oval as they grow larger. Used as a dye. Recipe by Olive. Upland Dewberry, Rubus invisus. When relying solely on herbicides to control these species, it is best to spray when blooming or in the fall prior to frost. Blackberry vs. Dewberry Fruit. Drupelet Color: purlplish black Dewberry is a trailing vine, not a high arching shrub like blackberry. USDA Plant Hardiness Zone: 3-8 (More information on hardiness zones). In different parts of the United States, you may run into olallieberry, marionberry, boysenberry, loganberry, and dewberry. Picking wild blackberries or dewberries is something we did every year for as long as I can remember. Swamp Dewberry, Rubus hispidus. Blackberry fruit belongs to the Rubus genus in the Rosaceae family which also includes raspberry and dewberry. Blackberry vs Dewberry. Northern Dewberry or Common Dewberry. A: They are both members of the Rubus genus, along with hundreds of other species. This fruit grows naturally in much of the US. Q: What is the difference between a blackberry and a dewberry? The recipe is for the filling only.