faciation
noun
fa·ci·a·tion
ˌfāshēˈāshən
plural -s
: a subdivision of an ecological association that is characterized by the codominance of two or more but not all the dominant forms of the association and that constitutes a community of considerable extent, its area usually being related to a climatic variation within the area of the association compare lociation
Word History
Etymology
Latin facies + English -ation