Hong Kong Orchid tree flower

Bauhinia blakeana is an orchid tree of the genus Bauhinia with large thick leaves and striking purplish red flowers. The fragrant, orchid-like flowers are usually 10 to 15 centimetres (3.9 to 5.9 in) across, and bloom from early November to the end of March. Although now cultivated in many areas, it originated in Hong Kong in 1880 and apparently all of the cultivated trees derive from one cultivated at the Hong Kong Botanic Gardens and widely planted in Hong Kong starting in 1914. It is referred to as bauhinia in non-scientific literature though this is the name of the genus. It is sometimes called the Hong Kong orchid (香港蘭/香港兰).

The Bauhinia double-lobed leaf is similar in shape to a heart, or a butterfly. A typical leaf is 7 to 10 centimetres (2.8 to 3.9 in) long and 10 to 13 centimetres (3.9 to 5.1 in) wide, with a deep cleft dividing the apex. Local people call the leaf "clever leaf" (聰明葉/聪明叶), and regard it as a symbol of cleverness. Some people use the leaves to make bookmarks in the hope that the bookmarks will bring them good luck in their studies.

It is sterile (does not produce seed), and is a hybrid between Bauhinia variegata and Bauhinia purpurea. Propagation is by cuttings and air-layering, and the tree prefers a sheltered sunny position with good soil. As it is only known in cultivation, it can also be named as a cultivar: Bauhinia 'Blakeana'.

Bauhinia forficata, commonly known as Pata de Vaca, is a species of flowering tree in the pea family, Fabaceae, that is native to Brazil and Peru.

The Fabaceae or Leguminosae, commonly known as the legume, pea, or bean family, is a large and economically important family of flowering plants. The group is the third largest land plant family, behind only the Orchidaceae and Asteraceae, with 730 genera and over 19,400 species. The largest genera are Astragalus (over 2,400 species), Acacia (over 950 species), Indigofera (around 700 species), Crotalaria (around 700 species), and Mimosa (around 500 species).

Plants of this family are found throughout the world, growing in many different environments and climates. A number are important agricultural plants, including: Glycine max (soybean), Phaseolus (beans), Pisum sativum (pea), Cicer arietinum (chickpeas), Medicago sativa (alfalfa), Arachis hypogaea (peanut), Ceratonia siliqua (carob), and Glycyrrhiza glabra (licorice), which are among the best known members of Fabaceae.

A number of species are also weedy pests in different parts of the world, including: Cytisus scoparius (broom), Ulex europaeus (gorse), Pueraria lobata (kudzu), and a number of Lupinus species.