Kolkey or Yellow oleander (Cascabela thevetia, family: Apocynaceae) is a small evergreen tree with profuse branches and soft stem. Bark is whitish grey and smooth. The whole plant emits milky latex and it is poisonous. The plant is originated in tropical America, Peru and Brazil. The tree is believed to have come to this country in the fifteenth century by Portuguese.
Other names: Holud korobi, Shonnyashi phul.
The tree is poisonous but it is one of the most beautiful trees in the world. The whole world is fascinated by its nice-scented beautiful flowers. As an ornamental tree it is planted in temples, garden and parks in Bangladesh. It is planted as homested tree in the country too.
Leaves are green, glabrous, linear, 10-15 cm long.
Flowers are funnel-shaped, sweet-scented; sepals 5, petals 5. Petals are twisted rightwards. Though it is called Yellow oleander in English but its flowers are of three colors--yellow, reddish orange and white. Flowering occurs round the year.
Fleshy fruit is almost ovoid, 4-5 cm wide, 2-seeded. Seeds are poisonous. Raw fruits are green but turn dark when ripe. These mature in late autumn. The plant is propagated by seeds and cuttings.
Root, bark, leaf and sap are used in scabies, intestinal gas and tetanus.
Other species of Apocynaceae family in the site
Til or Sesame ( Sesamum indicum , family: Pedaliaceae) is an annual herb with hollow stem and branches attaining a height of 50 to 100 cm. Sesame or Til seed is one of the oldest oil-seed crops o f t h e w o r l d. The plant is originated in Africa. It is cultivated as crop throughout the tropical world. Leaves are opposite, broad lanceolate, dark green, 4- 14 cm long with an entire margin . Flower is hairy, white or light pink, borne on leaf axil; 3-5 cm long with a four-lobed mouth. In Bangladesh, i t blooms generally in April-May. Sesame fruit is a rectangular capsule, 2-7 cm long, covered with tiny soft hair . Tiler khaja, a type of sweetened food made from sesame seed is very popular in Bangladesh. Propagation of the plant is caused by seeds. Seeds are usually off-white in c o l o r. Sesame is energizing, carminative and diuretic. It increases breast milk and sperms in male. It has been found useful in dyspepsia a
Shimul or Red silk-cotton ( Bombax ceiba , family: Malvaceae) is one of the most common trees that found in Bangladesh. This deciduous straight tall tree with thorny trunk and spreading crown is also found in tropical regions of Asia. In Bangladesh, the tree is planted in parks and on highways and beside national monuments for its gorgeous fire-red flowers. It can reach a height up to 60 m. Common names: Shimul, Red silk-cotton, Red cotton tree. Leaves are large, spreading, glabrous, digitate, leaflets lanceolate, entire, 10-15 cm long; petiole is up to 20 cm long. It blooms in spring (March-April). Flowers red, numerous, appearing when the tree is bare of leaves, stamens numerous arranged in five outer bundles and one middle bundle. Fruit capsules, woody valves. 10-13 cm in length. Seeds smooth, black or grey embedded in long white wool. Oh! the flame of the forest! Young plant is used in dysentery, cough, plethora, malnutrition and sexu
Jongli badam or Bastard poon tree ( Sterculia foetida , family: Sterculuaceae) is a large deciduous tree, up to 20 m in height, with branches arranged in whorls and spreading horizontally. Trunk is robust and straight. There are eye-like glands on the grey-colored bark. The tree has some resembles with Shimul . The children are in the womb! Leaves are digitately compound, leaflets 5-8, crowded at the end of branches, elliptic-lanceolate, tip elongated, acuminate, 10-18 cm long and 4-5 cm wide, petiole is very long, about 20 cm, though the length of leaflets are very short, almost sessile. Flowers are red-yellow or light purple, borne on a axillary panicles. Sepals 5. Flowers bloom is the end of winter or in spring. Although the flowers are beautiful but those have a very unpleasant odour. For this reason, the species have been named foetida