'long-fruited' originates from Modern English, specifically formed by compounding 'long' + 'fruited', where 'long' meant 'having great length' and 'fruit' meant 'the seed-bearing or produced part (produce)'.

'long' comes from Old English 'lang'; 'fruit' comes ultimately from Latin 'fructus' via Old French 'fruit' and Middle English 'fruyt'; the adjectival form 'fruited' is formed by adding the past-participle/adjectival suffix '-ed' to 'fruit', producing compounds like 'long-fruited' in modern botanical usage.

Initially, 'fruit' could mean 'produce, benefit, or result' as well as the botanical product; over time it narrowed in many contexts to the botanical sense of 'the seed-bearing part of a plant', which gives 'long-fruited' its current descriptive meaning.