The marigolds my grandmother grew around her garden were flowers of the sunflower family. There is also a marsh marigold, but I wouldn't call any of them shrubs, which are characterized by woody stems.
Marigolds are annual flowers that are generally orange or yellow. They have a strong odor which some feel keeps animals out of the garden.
Mint plant is a herb. It belongs to the family Lamiaceae. Menthol is obtained from this plant.
It is a fungus.
Lemon is neither an herb nor a shrub. It is a tree.
shrub
shrub
Shrubs
tree
Delonix regia
begonia is a shrub
Tree
Technically it is called a herbaceous shrub
A bougainvillea is a shrub or small tree.