Family: Fabaceae
Common names: White bauhinia, White orchid tree, White mountain ebony, White orchid bauhinia
I saw this tree when I went for a medicinal plant walk inside The University of Trans-Disciplinary Health Sciences and Technology (TDU) in Bangalore. What a marvellous tree!
It was in full-bloom with hundreds, even thousands of pristine white flowers that looked like orchids and also reminded me of Butterfly ginger or Hedychium coronarium. But these beautiful trees don’t belong to either of these families.
Bauhinias are a family of beautiful flowering plants, in a wide variety of colors. They belong to the Beans and Peas family of Fabaceae characterized by nitrogen-fixing bacteria in the roots, that convert atmospheric nitrogen into nitrates and nitrites, thereby improving soil quality.
Tree Characteristics
White bauhinia is native to a few countries of Southeast Asia, India, Myanmar, and surrounding regions. It grows naturally in warm tropical and subtropical climates where winters are mild and summers are warm. The tree is widely planted in gardens and along roadsides because of its elegant white flowers that resemble orchids.
White bauhinia is a small to medium-sized deciduous tree that typically grows about 6–10 meters tall with a spread of around 5–8 meters. It forms a rounded, spreading canopy with many slender branches.
The trunk is usually short and may reach about 25–35 centimeters in diameter. The bark is grey to light brown and becomes slightly rough and fissured as the tree ages. The root system is moderately spreading and generally not very aggressive, making the tree suitable for garden planting.
The leaves are one of the most distinctive features of this tree. They are broad, rounded, and deeply divided into two lobes at the tip, giving them the appearance of a butterfly or a camel’s hoof.
Each leaf is typically 8–15 centimeters wide and nearly as long, with a smooth surface and a soft green color. The tree may shed most of its leaves during the dry season before flowering begins.
Flowers appear in small clusters near the ends of branches and are large and showy, measuring about 8–12 centimeters across. The petals are pure white and slightly crinkled, with delicate veins that may appear pale green or faint yellow.
Flowering usually occurs from late winter to early spring when the tree is almost leafless, and completely covered with enchanting white flowers.
The fruits are flat, elongated pods that grow about 15–25 centimeters long and around 2–3 centimeters wide. These pods turn brown as they mature and contain several hard seeds. When fully dry, the pods split open naturally to release the seeds.
Gardening Tips
White bauhinia grows best in full sunlight and should receive at least 6–8 hours of direct sun each day for good flowering.
It prefers warm climates and does not tolerate severe frost. In cooler regions it should be planted in a sheltered spot that receives plenty of sun and protection from strong winds.
The tree prefers well-drained soil and grows well in sandy, loamy, or slightly clay soils as long as water does not stagnate around the roots.
Young plants need regular watering to establish strong roots, but once established the tree becomes moderately drought tolerant. Watering once or twice a week during dry periods is usually enough.
Spacing is important because the canopy spreads widely as the tree matures. Planting with at least 5–6 meters of space from buildings or other large trees allows the crown to develop properly. Light pruning after the flowering season can help maintain shape and remove weak or crossing branches.
Fertilization is usually minimal because the tree belongs to the legume family and can improve soil fertility naturally. However, adding compost or well-rotted manure once or twice a year encourages healthy growth and better flowering.
Occasionally, pests such as caterpillars, aphids, or scale insects may appear, but they are usually manageable with regular monitoring and basic organic pest control.
White bauhinias are closely related to Bauhinia acuminata also called White Orchid Tree, Bauhinia purpurea or Orchid tree, Bauhinia galpinii or Red orchid tree, and Bauhinia monandra or Pink Bauhinia.
Uses of White bauhinia
White bauhinia is widely planted as an ornamental tree in gardens, parks, and streets because of its beautiful orchid-like flowers and attractive foliage. When in bloom, the tree becomes a striking focal point in the landscape, especially when planted alone where its canopy and flowers can be fully appreciated.
In traditional medicine, different parts of the tree have been used for various remedies. The bark has been used in some traditional preparations for digestive problems and skin conditions. Leaves and flowers are also used in herbal practices in certain regions, where they are believed to have mild medicinal properties.
White Bauhinia trees are beneficial to the environment providing shade and shelter for many small birds and animals. Their flowers attract bees, butterflies, and other pollinating insects, and their roots have nitrogen-fixing bacteria that imrpove soil quality.
The tree provides light shade without becoming too dense, allowing smaller plants to grow beneath it.
In some regions the flower buds and young pods are occasionally cooked and eaten as a vegetable or made into chutney or pickles. The wood, although not very hard, is sometimes used locally for small household items or fuel.
Propagation
Propagation is through seeds and occasionally through cuttings.
Seeds are usually collected from mature dry pods and soaked in water for several hours before planting to improve germination. They are sown in nursery beds or containers and usually sprout within a few weeks in warm conditions. Seedlings grow fairly quickly and can be transplanted once they are strong enough.
Photographed at: The University of Trans-Disciplinary Health Sciences and Technology (TDU), Bangalore
