The capitulum type of inflorescence is found in
Marigold
Salvia
Euphorbia
Jasmine
Pappus is modification of
Tegmen develops from
An apocarpous flower is found in
In $3/8 $ alternate phyllotaxy $(Called\,\, ostastichous)$
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