Caeruleus
/see-ROO-lee-us/🏷️ Taxonomy●● Intermediate
Also known as: caerulea, caeruleum
A color epithet applied to plants with notably blue flowers or blue-tinted foliage or fruit. True blue is rare in the plant kingdom, making this epithet especially distinctive. Appears as caeruleus (masculine), caerulea (feminine), or caeruleum (neuter). Sometimes spelled coeruleus.
Etymology
From Latin caeruleus, meaning "blue" or "sky-colored," from caelum (sky, heaven).
Example
“Agapanthus caeruleus and Plumbago auriculata (Cape leadwort), sometimes listed as P. caerulea, showcase the vivid blue tones this epithet promises.”