If I remember right the Miqo'te/Meracydia connection was two things:

Sesame Seeds, which have the description:
A tiny seed rich in aromatic oil, sesame is native to Meracydia, and thought to have first been brought to Eorzea by migrating Miqo'te.

And Aloe:
A thick spiny-leaved cactus indigenous to the southern continent of Meracydia. The Miqo'te are known to treat severe burns with the cool gel-like substance found inside the leaves.

...which, aside from the Miqo connection in the text, is only used to make Cordials and Forest Miq'abob (A traditional Keeper of the Moon dish consisting of freshly picked mushrooms on a stick, roasted to perfection.)