'non-calyx' originates from the prefix 'non-' meaning 'not' and 'calyx,' which is derived from the Greek word 'kalyx,' meaning 'covering' or 'husk.'

'Calyx' transformed from the Greek word 'kalyx' into the Latin 'calyx,' and eventually became the modern English word 'calyx.' The prefix 'non-' was added to denote the absence of a calyx.

Initially, 'calyx' meant 'covering' or 'husk,' but over time it evolved to specifically refer to the outermost whorl of a flower, and 'non-calyx' denotes parts that are not this whorl.