A plant community consists of plants that?

Community refers to all the populations in a specific area or region at a certain time. Its structure involves many types of interactions among species. Some of these involve the acquisition and use of food, space, or other environmental resources. Others involve nutrient cycling through all members of the community and mutual regulation of population sizes. In all of these cases, the structured interactions of populations lead to situations in which individuals are thrown into life or death struggles.

A plant community would only exist if they were the only biotic factors in an environment, otherwise the community would involve microscopic organisms, bugs, birds, etc.