Filipendula ulmaria | Senna occidentalis | Platanus occidentalis | Thuja occidentalis | Sarcoscypha occidentalis | Osmorhiza occidentalis | Linderiella occidentalis | Juniperus occidentalis | Filipendula rubra | Euthamia occidentalis | Emblemariopsis occidentalis | Anemone occidentalis |
Associated plants include Alnus rubra, Filipendula occidentalis, Rubus parviflorus, Rubus spectabilis, Saxifraga occidentalis, Saxifraga nuttallii, Saxifraga mertensiana, and Mimulus guttatus, though it often grows on slopes with few other plants around.