What specifically is a Cote du Rhone blanc?

[zenda2]

I like Perrin Reserve Cotes du Rhone blanc. It's made of 50% Grenache Blanc, 20% Bourboulenc, and 10% Marsanne, Roussane, and Viognier. The Perrin's make another similar wine - their La Vieille Ferme white Cotes du Luberon made from Grenache Blanc, Roussanne and Ugni Blanc. It costs a few dollars less, but both are very tasty on a hot summer day.

http://www.wine.com/V6/La-Vieille-Ferme-Cotes-du-Luberon-Blanc-2005/wine/86815/detail.aspx

http://www.wine.com/V6/Perrin-Reserve-Cotes-du-Rhone-Blanc-2005/wine/87053/detail.aspx