Marion' is a trailing deciduous shrub with long, sparse, spiny, lax canes bearing pinnate, wrinkled, mid-green leaves and white flowers in spring followed by globular to conical, glossy, edible, sweet, dark red to black fruit ready for harvest in early to midsummer. The marionberry is a vigorously growing trailing vine, usually producing just a few canes up to 20 feet long. The vines have many large spines, and the fruiting laterals are long and strong, producing many berries. The berry is glossy and, as with many blackberries, appears black on the plant, but turns a deep, dark purple when frozen and thawed. It is medium in size and tends to be conical, longer than it is wide. The berry has a somewhat tart flavor, fairly earthy with traces of sweetness. It is larger, sweeter and juicier than the 'Evergreen' blackberry. The relative complexity of its flavor has led to a marketing label as the "Cabernet of Blackberries". The more powerful flavor of the marionberry has led to it dominating current blackberry production.