Petioles are light green with red pigment at the base. The terminal leaflets are large, ovate and symmetrical. Primary leaflets are symmetrical, ovate and partly truncate. Flowers are many, large and lavender with white at the apex. The calyx has red pigmentation at the base.
Anthers are large and orange with a moderate amount of pollen.
Tubers are oblong, smooth,blocky and slightly flattened with a thick, dark netted skin. Eyes are shallow and sparse on the stem end. Tuber flesh is white. Centennial Russet is adapted to certain areas of the West and to the San Luis Valley of Colorado. Tuber yields are low to intermediate when compared with Norgold Russet in the West but are moderate to high in the San Luis Valley.