Purely non-sexual reproduction in plants?

[Jochen Katz]

Are there any plants which have ONLY non-sexual reproduction
and don't have male/female organs?

I know many plants reproduce both ways, sexual and non-sexual,
but are there any which have only non-sexual reproduction?

thanks a lot for all info you can give,

Jochen Katz
jkatz at math.gatech.edu

Please also send your response to me via email since I am not
usually in this group and don't want to miss an answer.