Roots of which plant are used for treating blood pressure

Edible part in litchi is

Rhizobium lives symbiotically with root nodules and fixes atmospheric nitrogen. It gives nitrogenous compound to host and inturn takes food from host. This food taken by bacterium is

In which of the following sticky fruits are found

Velamen present in orchids help in

The condition where filaments and anthers are fused throughout entire length is