Robustior
/roh-BUS-tee-or/🏷️ Taxonomy●●● Advanced
A comparative size and vigor epithet indicating the plant is more robust than a reference form — stronger-stemmed, larger, or more vigorous. Appears as robustior (both genders).
Etymology
From Latin robustior, comparative of robustus (strong), from robur (oak, strength).
Example
“Geranium robustior and selections described as robustior are plants selected for superior vigor — stronger and more dependable than the species norm.”