Common name is the Rex Begonia Vine but of course it is not a begonia at all. It is in the grape family (Cissus). My wife bought one 14 years ago coming home from Key West. On one of the Keys we stopped at a small roadside nursery where I bought 3 big hanging baskets of begonias and she bought this glorious basket of Cissus discolor. Back when we got it I just called it Heart Vine not knowing its botanical name or even its common name.

So I've had this for 14 years and it grows very well outdoors in summer but struggles during winter. My lack of knowledge on how to keep this looking in peak condition in winter has set it back to a mere semblance of its prior glory. This summer I decided to do all I can to make sure it is restored to its magnificence so I've re-potted it in fresh potting mix, am keeping it under lights during winter, and most importantly watching my heavy watering hand. It has a long way to go but I am encouraged by what I see so far. I suggest you do something similar.

At one time I divided mine into four different pots but now I am down to one small pot and trying to get a comeback.

Humidity will help in winter if you want to go that route (maybe a ten gallon fish tank is all you need).

http://awaytogarden.com/the-rex-begonia-vine-cissus-discolor/

Consider another relative too - Cissus amazonica - Amazon jungle vine - not as flashy or as big but nice silver like leaves.

Thank you hc, I appreciate that info...It's doing well in my indoor greenhouse..But will eventually (hopefully) have to pot it up a size. Maybe into a hanging basket...I just took the tip of the vine off & put it in a shot glass. Just for fun...Sure is a beautiful plant. I Love it.

i rooted sev cutting last year and they seemed ok in summer. but from the start i noticed very strange tiny 'beads' on the underside of the leaf. i got alarmed that these might be mite eggs. i proceeded to spray, wash, put in indoor systemic just in case these are not mites, but smth else. they wash off readily, but then show up again - but i see no mites at all! and i know mite infestation when i see it!

i started examining underside of leaves where-ever i see the plant - in all cases i find these little granules...can you check your plants to see if you have them too?

i just started 2 more cuttings - they had them too :)...what is this mystery, some sort of exudation on plant part?

It is part of the plant. No worries. I believe it is Calcium Oxalate Crystals and there are many theories on why some plant families create these crystals.

Some plants have fuzz/lint on their leaves and people will try to rub this off - often to the dismay of the plant. Sometimes it is disease but then the plant will usually look very sick.

http://inquiry.uark.edu/issues/v04/2003a14.pdf

oh, what a relief! thank you!

i was keeping the plant isolated, as i was afraid to infect other plants. and constant spraying was a chore, of course.

my 1 year old vine did well in summer outside, and i was keeping it tented in the fall - and it was somewhat dark indoors. so it dropped most of the leaves.

i took it with me to florida as a last attempt to save it and it is regrowing now - sprouting buds all along the wooded vine. so i can say that super warm (80F) bright light with part sun (low evening sun) and higher humidity woke it up within a month! but at this stage it is a very slow grower.

I think C. discolor is from Java and Cambodia from what I could find on line. It does great in tropical weather. Just wished it did as well indoors in winter. Perhaps a terrarium is required for best results.