close up of crepe ginger (costus speciosus) white flower blossoming. botanischer garten kit karlsruhe, germny

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