Gigantochloa verticillata
Depending on which expert to believe, this plant might be either the real Maxima or the real Robusta. Or something else. Whatever its botanical id, this large, striated, beautiful and strong species is a great plant.
Large, to about 60′ with construction grade canes (about 6″ possibly larger in a wet place) edible shoots. Beautiful growth habit.
To the best of knowledge, this plant has not been available in Hawaii until now.
please also see Maxima