Wine Grapes: Malbec

Malbec formerly known as Côt originated in Cahors is a half sibling of Merlot through Magdeleine Noire des Charentes and a parent of Jurancon Noir by crossing with Folle Blanche. This variety was introduced to Gironde in the 18th century and currently one of the six grapes allowed in Bordeaux Blend and a very famous varietal in Argentine wines.

If harvested before it's maturity, the palate is herbaceous with very prominent tannins. It ripens mid-season and requires more sunlight to mature. Malbec wines are generally rich and juicy with medium acidity and tannins. 

Source: Wine Grapes 
A complete guide to 1,368 vine varieties, including their origins and flavors
Jancis Robinson, Julia Harding, and Jose Vouillamouz
Published by the Penguin Group