This jiyū-ka arrangement features Chinese lantern (hōzuki) and Japanese gentian (rindō). I don’t believe I have ever seen Chinese lantern in person before, but it is a well-known plant in Japan. It is associated with Obon, a very important festival for remembering and honoring one’s ancestors. Obon involves welcoming back the spirits of ancestors to the human world and later showing them the way back to the world of the afterlife. Lanterns or the bonfires like those in Kyoto serve to guide the spirits in both directions, it is this plant’s resemblance to a lantern that makes it a popular decoration and offering during Obon.