close up of crepe ginger white flower blossoming

african asia asthma ayurveda banksea blossom bract bronchitis cane cheilocostus closeup color costaceae costus craordf crepe dubius evergreen family flag flower flowring foliage garden ginger hardy hellenia indomalaysia invasive koot kostwurz kut kuth malay orange ornamental perennial red reed root southeast speciosa speciosus spiral stem subtropical thailand tropical white yellow