Foxtail

Foxtails are rare plants used for scenery in Pikmin 2; they are only seen in the Valley of Repose and Wistful Wild, and never in caves. They do not affect gameplay at all, as they are only for decoration. These plants appear as withered grass stalks with a plume of seeds on the tip, though the exact real-world species cannot be identified.

Olimar's Notes
This plant remains erect after withering and losing its color, so we can only hypothesize about the true color of the plant's plumage. However, local soil analysis indicate trace amounts of dormant seeds, making it not hard to imagine that the area was thick of these plants in the summer.

Louie's Notes
Inedible. Plagues victims with potent, debilitating cramps.

Pikmin:Redemption
This is called a Withered Foxtail and a new version of the Foxtail is present.