Jujube

The sweet and edible drupes (fruits) of several Mediterranean and African species of small trees, of the genus Zizyphus, especially the Z. jujuba, Z. vulgaris, Z. mucronata, and Z. Lotus. The last named is thought to have furnished the lotus of the ancient Libyan Lotophagi, or lotus eaters.

dark red plumlike fruit of Old World buckthorn trees

spiny tree having dark red edible fruits