Is blackberry a blueberry? What's the difference between them?

Difference:

Blackberry:

It is a perennial vine of Rubus in Rosaceae. Blackberry is a widely distributed and well-known shrub. Rubus, usually biennial, has erect, semi-erect or climbing stems with thorns, and some cultivated species have no thorns. It can grow to 3 meters high and bear soft fruit. It is often used as dessert, jam, seedless jelly and sometimes used to make fruit wine. The leaves are trifoliate or palmately compound, with 3 to 5 leaflets, wide oval shape, stipe, thick teeth on the leaf margin, and most of them overwinter. The flowers are white or pink, the fruit is aggregate fruit, and the small black or purple drupe grows on the juicy receptacle.

Blueberries:

A small berry, the fruit is blue, the color is beautiful, the blue is wrapped by 1 layer of white fruit powder, the flesh is delicate and the seeds are very small. The average weight of blueberry fruit is 0.5-2.5g, the maximum weight is 5g, the edible rate is 100%, it is sweet and sour, and the aroma is pleasant, so it is a good fresh food.