× Phyllosasa
× "Phyllosasa " is a nothogenus (genus of hybrid origin) of Japanese bamboo in the grass family. It consists of a single nothospecies of bamboo, × "Phyllosasa tranquillans", native to woodland in southern Honshu in Japan. It is considered to be a hybrid between "Phyllostachys nigra" var. "henonsis" and "Sasa veitchii" f. "tyugokensis". It is a spreading, clump-forming bamboo growing to tall, with very dark green leaves or more in length. The variegated cultivar 'Shiroshima' is found in cultivation.