The first picture shows a Select Grade bundle of Ornamental Rice, which is tied with raffia and trimmed for free-standing display. The second picture shows a Rice Bundle dropped into a vase and allowed to splay outward. The third picture shows a pair of Harvest Centerpieces, created using Avena (Oats), Rice, and Golden Wheat. You can read about the construction of the centerpieces here
. The last picture shows shows a harvest centerpiece that has been displayed for a year. Note that the Ornamental Rice has retained its color, and the dripping effect has heightened.