Herculeus
/her-KYOO-lee-us/Also known as: herculea, herculeum
A mythological epithet invoking Hercules — the hero of extraordinary strength — applied to plants that are exceptionally large, robust, or powerful in some way. Like olympicus, it is one of a small group of epithets drawing on classical mythology to convey superlative impressiveness. Appears as herculeus (masculine), herculea (feminine), or herculeum (neuter).
Etymology
From Latin Herculeus, meaning "of Hercules," from Hercules, the Roman name for the Greek hero Herakles, famed for his extraordinary strength.
Example
“Heracleum mantegazzianum (giant hogweed) is one of the most dramatically large plants in temperate flora — a species so massive that the Hercules-invoking genus name Heracleum (from the same root) is entirely justified.”