There are two different looking plants being sold in Washington as Muehlenbeckia axillaris. One of them has much smaller leaves and inter nodes. I've tried looking on the Internet but there does seem to be some confusion about this genus. Is there really a Muehlenbeckia axillaris nana? That might be the smaller one. I grew it in my zone 7 garden last year and it overwintered well and grew but it still has the smaller type leaves. I would would like to try the other one too but I would like to know what it is. If it is M. complexia do you think it would be as hardy here? Thank you for helping me clear up this confusion. Edited to add that I looked in a Hortus Third and it looks like the nana name is wrong. I also see there is a M. variens of garden origin that it might be. Do you think it might be that one? I have not seen the large leaf one flower.