caerulea
/see-ROO-lee-uh/🏷️ Taxonomy● Basic
A colour epithet reserved for true blue - the clear sky-blue or deep cerulean that is uncommon among flowers and so worth recording in a name. This is the feminine form, paired with feminine genus names. Appears as caeruleus (masculine), caerulea (feminine), or caeruleum (neuter).
Etymology
From Latin caeruleus, meaning "sky-blue," from caelum (sky, heaven).
Example
“Passiflora caerulea (blue passion flower) shows the blue-banded corona filaments that earned it the epithet.”