> For several years running, I've had my D. pauciflora die back to the
> roots when it gets hot (80-90F) during the day. If the fleshy roots
> haven't rotted, I get sprouts back in about 1-2 months time.
>
This is normal for such this plant. Pauciflora is in the same group as
cistiflora, alba and esterhuizen and trinervia. THey behave much like the
australien touberous drosera and require a summer dormancy for their well
being.
> I suspect that South African CP just have trouble tolerating
> temperatures so high, because my D. regia and D. natalensis also look
> very stressed at the height of our summer.
>
Yes, this is true for even D. capensis and D. aliciae. Though the plants you
mentioned above at least the D. regia grows in places that has a cool
seabreaze. At least I thinkI have heard this somewhere.
Christoph