Dear Vijaysankar-ji,
How should confirmation be obtained? Do I have to wait and see how it
grows?
On closer inspection, I find that the cross-section is cylindrical and
almost square in parts with one section having a fluted side.
I find no resmblance to Neil's pics of C. repanda.
On the downside, I am mortified to think that I paid good money for a
Cissus quadrangularis,
which I could have got from any wild place!
Thanks for all the suggestions, Gurucharan-ji, Satish-ji, Neil-ji and
Tanay-ji.
Regards,
Padmini Raghavan.