Zingiber officinale - Common names: ginger, common ginger, cooking ginger, Canton ginger. Description, culture, and usage. Includes images. - http://www.floridata.com/ref/Z/zing_off.cfm
Zingiber zerumbet - Common Names: pinecone ginger, shampoo ginger, Awapuhi kuahiwi (Hawaii). Description, culture, and usage. Includes images. - http://www.floridata.com/ref/Z/zing_zer.cfm
Zingiber officianale - Canton ginger or common ginger. Description and taxonomy. - http://florawww.eeb.uconn.edu/acc_num/199700004.html
Zingiber spectabilis - Beehive ginger. Description and taxonomy. - http://florawww.eeb.uconn.edu/acc_num/199700003.html