Found exclusively in Jonah 4:6–10, this noun denotes the fast-growing plant God prepared to shade the reluctant prophet, then destroyed with a worm. Its precise botanical identity has long been debated. The Spanish 'ricino' (castor plant) reflects the traditional rabbinic and Septuagint identification with Ricinus communis, known for its rapid growth in the Levantine climate. The narrative uses this plant to teach Jonah about divine compassion for Nineveh.