Flora of Bangladesh

Raj oshok or Pride of Burma ( Amherstia nobilis , family: Caesalpiniaceae) is an evergreen medium-sized tree with branches, attaining a height of 10-15 m. The slow-growing tree looks like its family member Ashoka . The plant is originated in Myanmar. It is found in the Hill Tracts of Chattogram in Bangladesh as well as some countries of Southeast Asia. It is grown in gardens, parks, botanical gardens and along roadsides for its extraordinary shape of flowers.  Common names: Queen of flowers, Queen of flowering trees, Burma flower, Amherstia, Shokrey.  Leaves are compound, rachis 30-45 cm long. Leaflet is lanceolate, 10-15 cm long. Young leaves with various beautiful shades of pink, copper, mauve or purple hanging loosely from the end of branches, turn bright green on becoming firm.  The hanging inflorescence is spectacular, quite long, 50-75 cm. The flower at the base of the inflorescence blooms first, then the later ones gradually. Flower is bright red-yellow, sepals 5, petals 5. T

Boro shialmuti  or Siam weed ( Chromolaena odorata, family: Asteraceae) is a fast growing and highly reproductive perennial herb with many branches. In suitable condition, it can grow up to 10 m. Branches are hairy and glandular, stem woody. It grows in fallow land, in jungle and on the side of roads. It is regarded as an invasive plant round the globe. It has been said that, in Bangladesh, it escaped from the botanical gardens of Dhaka in the 19th centuary. It is originated in Americas, from USA to South America.  Leaves are green, triangular-ovate, 3-10 cm long, 2-5 cm wide, deeply dented with pointed end, opposite. The leaves give off a pungent scent when crushed. Bunch of flowers bloom in the shape of head. Flowers are small and light violet.   Fruits are round. Seeds are achenes, hairy. Propagation of the plant is caused by seeds. The seeds usually float in the air and travel long distances. However, it can go to different places through the body of  animals and human. Its leave