The so-called plant is highly common in our Travancore belt. We have two types of cheruchembu. They are called Kannan and Thamarakkanna. What you are planted is Kannan chempu. A third verity is also we cultivate, called Karichempu, used exclusively to cook Currys. The fourth Verity is the so called Chemachembu, common to all. I think in Travancore we have different verities. Nevertheless, at least farmers should preserve these indigenous cultivation.