Banner
Black Olive - Bucida buceras PDF Print

Bucida Buceras Leaves

Common Name: Black Olive, Shady Lady
Scientific Name: Bucida buceras
Hardiness Zone: Zone 10B through 11
Family: Combretaceae

General Information

The black olive (Bucida buceras L.) is native to the Yucatan peninsula and along the coast of Mexico, Central America and northern South America to the Guianas; the Bahamas, and the Greater and Lesser Antilles as far as Guadeloupe. Salt tolerant, the black olive grows in coastal swamps, wet inland woods, and on river banks, and tolerates dry limestone areas of South Florida. The tree is sturdily erect with tiered, whorled, often thorny branches, at first horizontal and later drooping. It is prone to producing suckers at the base. The elongated main branches bend downwards, making the tree top-heavy. Other drawbacks include the tree’s need for regular pruning and its susceptibility to several pests and over two dozen diseases. The natural range of this tree is from southern Mexico and Yucatan through Guatemala, El Salvador, Costa Rica, Honduras and Belize, and coasts of Colombia and Venezuela (including Margarita) and the Guianas to Panama. It is “doubtfully native” but cultivated in Barbados, ranges northward from Guadeloupe, to Jamaica, Cuba, Hispaniola, Puerto Rico and the Virgin Islands, the Bahamas (New Providence, Andros, Inagua) and the Caicos Islands. In Jamaica, the black olive grows in salt-marshes on the seacoast, commonly along “lagoons, swamp and river margins”. It occurs in Puerto Rico and the Virgin Islands on “plains, hillsides, river banks and in coastal woods”. It is usually associated with mangroves in the coastal swamps of Belize. On the Atlantic coast of Guatemala, it flourishes along the beaches. There are solid stands of the black olive in parts of southern Mexico on clay (originally calcareous) soils that are periodically inundated. It was seen on Elliott’s Key in early days and “the range was originally thought to have included the Florida Keys, but it is now believed that it did not occur on the Keys before colonization”.

Bark Characteristics: Old Bucida's may have rugged bark, while newer trees grown in nurseries have smoother bark. The sapwood is thick, pale-yellow or light-brown and not as durable as the heartwood. The heartwood is light yellow-brown or dark-brown, sometimes streaked with orange.
Leaf/Foliage Characteristics: The leaves are leathery, up to 3 1/2" long; the leaves are oblanceolate, alternated, and whorled.
Growth Characteristics Branches grow in a tiered fashion with individual twigs grow in a sig-zag pattern. Some trees are spineless, but others often bear shaper 1/4" to 3/4' long spines on the young lower branchlets.
Flower/Fruit Characteristics: The black olive appears to be evergreen but there is a steady fall of leaves all year round. Tiny flowers, pale-yellow or greenish-white, appear in dense, stalked spikes, rising from the leaf bases. The small, somewhat hairy, fruits are black, 5-angled, 1-seeded. Seeds are minute, brown.
Lighting: Full sun, protect when tempertures approach 40 degrees F.
Watering: Keep well watered, reducing watering only slightly for younger trees.
Feeding: Use a well balanced fertilizer.
Pruning/Wiring: The top of the tree may be pruned heavily during the summer months. The branches form a natural zig-zag pattern making wiring relatively fun and easy. Be careful with smaller branches as they are brittle. Remove flowers from the tree as they appear, to encourage greater branch growth.
Propagation: The black olive is difficult to propagate. Growth may be fast or slow. It has been calculated that there are 38,000 seeds per 2.2 lbs. The seeds germinate 12 to 17 days after planting in a nursery but many are damaged by insects. Only 2500 of the seeds in the 2.2 lbs. may actually grow. Many seedlings do not survive transplanting. In rich soil, some may reach 30 ft. in height in 10 years. Terminal softwood cuttings succeed well in a mist-bed. Air-layering is also a practical means of propagation.
Potting: Roots are sensitive to major work. Reduce rootball over several repottings. Repot during the summer months in a well draining soil.
Pests: Philaphedra scale causes the black olive to lose all its leaves; the mite Eriophyes buceras prevents normal fruit development, causing long, string beanlike galls. Both galls and leaves are high in tannin that stains sidewalks, vehicles, white roofs and cement decks. Black olive trees are often subject to attack by large flights of the Keys whitefly (Aleurodicus dispersus), which exude honeydew, resulting in Sooty Mold. Bark borers.
Diseases: Sooty mold.
Bibliography: THE BLACK OLIVE (BUCIDA BUCERAS L.), A Tropical Timber Tree, Has many faults as an ornamental; Proc. Fla. State Hort. Soc. 106: 1993. ; Julia F. Morton, Morton Collectanea, University of Miami Coral Gables, FL 33124
Bucida Buceras Flowers Bucida Buceras Bark
 
Banner