About Markhamia lutea (Benth.) K.Schum.
Markhamia lutea, commonly known as the Nile tulip, Nile trumpet, or siala tree, is a tree species belonging to the plant family Bignoniaceae. It is native to eastern Africa and cultivated for its large, bright yellow flowers, and it is related to the African tulip tree. The genus Markhamia was named in honor of Clements Markham (1830–1916), who worked in India. Markhamia lutea is an evergreen small tree. In regions outside its native range, it typically reaches 4–5 meters in height, while in its native growing zones it can grow to over 10 meters tall. Its leaves are 20–30 cm long, and are usually clustered at the tips of branches. Flowers grow in terminal clusters; they are trumpet shaped, yellow in color, with orange-reddish spots in the throat, and measure 5–6 cm in length. The fruit is a capsule that can grow up to 70 cm in length, and contains numerous winged seeds. This species is propagated by seeds.