Dear Lalithamba ji and Mandru ji,
I found a Telugu name "malli dumpa" for the tuber of Peristylus lawii Wight
I am familiar with the word దుంప
dumpa
for tuber, typically an edible tuber.
But I am not sure about malli ... would it be మల్లి ... or ... మళ్ళీ ?
Regards.
Dinesh