Zingiber purpureum var. palamauense
Cassumunar roxburghii Zingiber cassumunar var. subglabrum Zingiber cliffordiae Zingiber luridum Zingiber paucipunctatum Zingiber xantorrhizon Amomum cassumunar Amomum xanthorrhiza Zingiber anthorrhiza Zingiber pubisquama
World Flora Online, http://www.worldfloraonline.org/, accessed June 20, 2024