I had to look it up: devigorated. That's what it says on the back label of the bottle: "...these grapes are from perhaps the new world's only Riesling vines planted to high density on devigorated rootstock."
devigorated - I didn't know what it means so I looked it up.
Apparently it is a rootstock that tames a vine's tendency to vigorous growth if the vineyard's soil is too rich. (Thank you, Matt Kramer's "New California Wine"). Could be a scientific way of saying that the vineyard is actually not really suited for grape growing, hence we need to devigor the vines.
Anyway, Argyle's 2007 Riesling from the Lone Star Vineyard has a medium lemon color and a medium intensity aroma of apple and wet leaves. It is dry (10g of residual sugar) and has with medium(+) acidity and medium(+) alcohol. It is fairly pronounced on the palate with flavors of apple , tangerine and pepper. Medium(+) length with a nice soft finish. Drink now through 2013.
A Riesling of moderate complexity, but with a refreshingly acidic character.