This jiyū-ka arrangement features 3 plants. The branches with leaves and berries are called “natsuhaze” in Japanese. “Natsuhaze” is native to East Asia, and might be called “oldham blueberry” in English. The long grass is a variety of Japanese pampas grass called “takanoha susuki.” Finally, the red flowers at the base are cockscomb, or “keitou” (鶏頭 “chicken head,” as youcan see, it’s the same meaning in both languages!).
I thought the vase was particularly interesting, it was the first time I’ve seen such a colorful vase for an arrangement in Goten.