Hydrangea quercifolia, Hydrangea petiolaris, Hydrangea arborescens, Hydrangea Paniculata and Hydrangea Sargentiana.
Some species are used medicinally.
The best known is Andrographis Paniculata, which is valued in Ayurveda, Unani, and Siddha medicine.
The culture(with the exception of the hydrangea Paniculata) is rather capricious and demanding,
but if it“goes”, the grand front garden is provided for the whole of July-August.