Twigs are glabrous. Flowers are white, and fruit is red or yellowish. Terminal buds are present. A. Buds are usually clustered at the ends of twigs in an oak-like fashion. Small, round glands on petioles are often missing, even on young growth.
Twigs are glabrous, slender, reddish, and shiny.
Flowers are white and borne solitarily, or few flowers in a cluster. Fruit is a red drupe. Buds are usually not clustered at ends of twigs. Terminal buds are larger and more pointed than the lateral buds. Glands on petioles are always present.