SafePlants

Hong Kong Orchid Tree (Bauhinia blakeana)

The Hong Kong Orchid Tree, scientifically known as Bauhinia blakeana, is a stunning ornamental tree prized for its beautiful flowers and lush foliage.

Considerations for Pets and Children

• The plant has large, thick leaves.

Taxonomy and Nomenclature

• Scientific Name: Bauhinia blakeana Dunn
• Common Names: Hong Kong Orchid Tree
• Family: Leguminosae (Fabaceae) / Leguminosae subfam. Caesalpinioideae
• Tribe: Cercideae

Distribution and Habitat

• Bauhinia blakeana was first discovered in Hong Kong at the end of the 19th century.
• Native to southern China.

Morphological Characteristics and Growth Habits

• Grows to a height of 20 to 40 feet.
• Features a rounded, spreading canopy.
• Leaves are large, gray/green, and 6 to 8 inches in diameter.
• Produces striking purplish-red, fragrant, orchid-like flowers.
• Considered semi-deciduous; may drop leaves.

Ecological Role

• In Guangzhou, South China, Bauhinia blakeana has been studied for its dust retention capacities in urban areas.
• The fragrant blooms attract birds and bees.

Genetic Information

• It is a sterile hybrid between Bauhinia purpurea and Bauhinia variegata. Some scientists believe it is a hybrid between these species, but they have been unable to duplicate the cross.
• Ongoing preparations are being made to sequence its genome.

Quirky Facts

• The flower of Bauhinia blakeana was adopted as the emblem of Hong Kong in 1965 and has been used since 1997.
• Sir Henry Blake, a former Governor of Hong Kong, is credited with the tree's discovery near the ruins of a house on the seashore.

Cultivation

• Best suited for USDA Hardiness Zones 9-11.
• Prefers full to partial sun.
• Water a couple of times a week, more if hot and dry.
• Fertilize about 3-4 times a year.

Further Information

• USDA List of Plant Genera