On 17/10/2020 19:27, Nick Maclaren wrote:
In article ,
Charlie Pridham wrote:

Apart from the lack of a saucer it seems to fit with Cobaea scandens.
The web is reluctant to disgorge images of species other than Cobaea
scandens and Penstemon cobaea, but Cobaea pringlei has a non-spreading
calyx. Your plant looks somewhat intermediate between Cobaea scandens
and Cobaea pringlei.

Thanks very much - I thought of the former, but there's no saucer
and the flower is the wrong shape. The latter rings a bell, so
that's probably what it is.

I think you may have had it off me some years back Nick, gets big!

I did. I may have it in the wrong place, and have been treating it
wrongly, by cutting it down each winter. Is it likely to survive
transplanting?


Regards,
Nick Maclaren.


Best try and get some rooted pieces off in the spring (may time) can be
cut away completely after the first frost, right down to the bare soil

--
Charlie Pridham
Gardening in Cornwall
www.roselandhouse.co.uk