Represented by 3 fruiting collections from the Montagne d’Ambre. Leaves are 4-7 × 1.5-2.5 cm, glabrous, petioles to 6 mm long, domatia lacking. Terminal buds are slender and appressed pubescent. Fruits are 3 × 1.5 cm, cupules shallow, bowl-shaped, c. 1.5 cm across and 4 mm high. The black fruits are almost fully exposed on the red cupule; this color combination suggests the fruits were mature. It differs mainly from O. racemosa in the large fruits and shallow, wide cupules. Flowers are not known. The three collections are Andrianantoanina & Rocsce 365 (MO, P), Malcomber et al. 982 (MO, P) and Schatz et al. 1497 (MO, P) and were made in September and October.