'long-stalked' originates from Modern English, formed as a compound of 'long' and 'stalk', where 'long' meant 'of great length' and 'stalk' meant 'a stem or stalk (of a plant)'.

'long' comes from Old English 'lang' (meaning 'long'), and 'stalk' comes from Old English 'stealc'/'stalc' (meaning 'stem, stalk'); these elements were compounded in Modern English to form 'long-stalked'.

Initially it meant 'having a long stem or stalk', and this basic meaning has remained consistent into modern usage.