How did the sithars call vallarai keerai?

The term "vallarai keerai" is a Tamil word. The Sithars, who were Tamil saints and mystics, would have used the same Tamil name to refer to this leafy green vegetable.

There isn't any specific record or historical evidence of Sithars using a different name for vallarai keerai. They were known for their knowledge of herbs and their medicinal properties, and vallarai keerai was likely included in their knowledge base.