That is indeed ginger
Alpina purpurata,
red ginger,
Also known in Hawaii as
awapuhi ula ula.
It's an ornamental that has become naturalized in the Hawaiian Islands.
Originally from the South Pacific, varies in color from red to pink.
Lat: 21.31, Long: -157.86
Spotted on Dec 28, 2010
Submitted on Feb 28, 2011