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
Guloncho or Heart-leaved moonseed ( Tinospora cordifolia , family: Menispermaceae) is a deciduous creeper with hard and long stem, climbing other trees or fences. Bark on the stem is as thin as paper. Aerial roots come out of the stem when the plant grows older. The plant is found everywhere in Bangladesh except southern part. It is also native to South and Southeast Asia. Common names: Heart-leaved moonseed, Guduchi, Giloy, Guloncho, Guroncho, Padma guloncho. Leaves are simple, green, alternate, cordate, 6-15 cm long and 5-13 cm wide. Inflorescence, growing from the axil of leaflet branches, bears yellow flowers. Male and female flowers bloom separately. Sepals 6, arranged in two rows, petal 6, pistils 3. Fruit is a drupe, brilliant red when ripe. This attractive fruit is inedible to human. What an extensive climber! Tinospora cordifolia is used in weakness, tastelessness, rheumatis
Makal or Mahakal ( Trichosanthes tricuspidata , family: Cucurbitaceae) is a woody climber with tendril and branches, attaining a height of 10-12 m. The multiangular-branched plant climbs up very far by holding any tree in the forest. It is found in the hilly areas as well as plain forests and village thickets in Bangladesh. It is also found in Indian subcontinent, Australia and some countries of South and Southeast Asia. According to ancient Sanskrit scriptures the other names of the plant are Bishala, Mohendro-baruni. In the Himalayas it has been seen at an altitude of 5000 feet. There are many refferences to the fruit in Bangla and Sanskrit literature. Someone is very nice to look at but he/she is useless--writers usually jokingly give examples of this fruit. Its roots and attractive fruits are packed with medicinal properties. The size and shape of leaves may vary. These are multilobed or trilobed, alternate, rough in both sides, 5-12 cm long, petioled, cor
Kulekhara or Talmakhna ( Hygrophila auriculata , family: Acanthaceae) is a stout and erect herb with straight and undivided stem. The spiny plant is very popular as a medicinal plant in Bangladesh as well as the Indian subcontinent. Other names: Kulekkha, Kuiley-rekha, Kanta kalika, Shoolmordon. Leaves are lanceolate, subsessile, acute at both ends with long whitish hairs, dense with straight and stout thorns that grow from each node. Outer leaves are longer than the inner ones. Both leaves and thorns remain in upward direction. Flowers in axillary whorls. They are bright violet or bluish purple and red, sometimes whitish with soft and minor hair, corolla 2-lipped. Flower blooms in the winter. Fruit a capsule, 4-8-seeded. Seeds are ovoid (not in the pic). The body of the plant contains alkaloids, phytosterols, stigmasterol, lupeol and essential oils. Its seeds contain oil, enzymes and sterols. The plant is cooling and diuretic in cases of h