I saw that Flora of Pakistan hit, also wondered at that name. I don't think that's a botannical name. But it says it's most closely related to I. niamniamensis, and PF says to direct sow after last frost, which would indicate no cold treatment.
B&T also says warmth
http://b-and-t-world-seeds.com...
Tropicals generally don't require cold as such conditions are not available to them in nature...
Karen
