Rikka (立花 "standing flowers") is a form of ikebana.
The origins go back to Buddhist offerings of flowers, which are placed upright in vases. This tatehana style was established in the Muromachi period (1333-1568).
The term came to be a popular synonym for ikebana in the 15th century, when rikka became a distinctive element of interior decoration in the reception rooms at the residences of the military leaders, nobility, and priests of the time. It enjoyed a revival in the 17th century, and was used as a decorative technique for ceremonial and festive occasions.
Today it is still practice by the Ikenobō school of flower arranging.
The rikka style reflects the magnificence of nature and its display. For example, pine branches symbolize endurance and eternity, and yellow chrysanthemums symbolizes life.
Rikka arrangement by Shūgyoku (from Rikka-zu narabini Sunamono-zu)
Rikka arrangement by Daijuin (from Daijuin Rikka Sunamono-zu)