This plant was collected many years ago in Colombia by the famous plant explorer Tim Plowman. It has gone unidentified until recently when I registered it with the cultivar name 'Lemon Chiffon'. It best fits the description of the species Costus laevis but is not at all the normal form. It produces beautiful soft lemon yellow flowers with a deep pink center contrasted against dark red bracts.
Costus 'Lemon Yellow' has not been tested for cold hardiness, but probably requires at least zone 9B conditions.