Can anyone tell me the dif­fer­ence between ‘autoch­thonic’ and ‘indi­gen­ous’ (in cul­tural stud­ies terms not botanic terms[1]) and explain why I’m start­ing to see autoch­thonic more?

[1] Although, come to think of it, dai­syn­erd and maybe even jet­speaks, per­haps an explan­a­tion of the botanic terms will help me under­stand their use in cul­tural stud­ies anyway…