 However, mulberries, which closely resemble blackberries, are not aggregate fruit, but are multiple fruits, actually derived from bunches of catkins, each drupelet thus belonging to a different flower.Certain drupes occur in large clusters, as in the case of palm species, where a sizable array of drupes is found in a cluster.Examples of such large drupe clusters include dates, "Jubaea chilensis" in central Chile and "Washingtonia filifera" in the Sonoran Desert of North America.