douglasiana
/dug-lass-ee-AH-nuh/🏷️ Taxonomy●●● Advanced
Also known as: douglasianus, douglasianum
A commemorative epithet built as an adjective rather than a genitive, honouring the Scottish plant collector David Douglas. Where the genitive form says of Douglas, this -ianus adjective says Douglas-like, and its ending shifts to agree with the genus. Appears as douglasianus (masculine), douglasiana (feminine), or douglasianum (neuter).
Etymology
From the surname Douglas with the Latin adjectival suffix -ianus, meaning "of Douglas."
Example
“Iris douglasiana (douglas iris) and Artemisia douglasiana (California mugwort) both take the adjectival form, agreeing with their feminine genera.”