Fenestraria aurantiaca (English spelling)

Japanese: Fenestraria aurantiaca（英語表記）Fenestrariaaurantiaca

…One of the most unique shapes is the lenticular plant, or window plant, whose leaves are partially translucent and shaped like lenses. Representative species include Peperomia lunnella (Peperoraceae), Fenestraria aurantiaca NEBr. (Zanthaceae), Haworthia truncata Schönl. (Tamaougi), and H. manghanii Poeln. (Liliaceae). Sandstorms often occur around the rocks where the lenticular plants grow, and the small lenticular plants are buried in the sand. …

From Mesen (female fairy)

… [Hiroshi Yuasa]. …

*Some of the terminology that mentions "Fenestraria aurantiaca" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…最も特異な形状の一つに，葉の一部が半透明のレンズ様に変化したレンズ植物，あるいは窓植物と呼ばれる種類がある。その代表種にはコショウ科のペペロミア･ルンネラPeperomia lunnella，ザクロソウ科の五十鈴玉（いすずぎよく）Fenestraria aurantiaca N.E.Br.，ユリ科の玉扇（たまおうぎ）Haworthia truncata Schönl.や万象（まんぞう）H.manghanii Poeln.などがある。五十鈴玉の生えている岩場はしばしば砂嵐が起こり，小さい五十鈴玉は砂に埋もれてしまう。…