'clustered-flowered' originates from English, specifically the words 'cluster' and 'flower' (with the adjectival/participial suffix '-ed'), where 'cluster' meant 'a bunch or group' and 'flower' (from Latin 'flos, floris' via Old French) meant 'blossom'.

'clustered' developed from Middle English forms related to 'cluster' and 'flower' comes from Old French 'flor' / Latin 'flos, floris'; the modern hyphenated compound 'clustered-flowered' arose by combining these elements in English to describe plants with clustered blossoms.

Initially the elements referred separately to a 'bunch' ('cluster') and a 'blossom' ('flower'); over time the compound came to denote the specific botanical quality 'having flowers in clusters', a descriptive adjective.