Eurybia macrophylla (bigleaf aster) is a herbaceous species of plant in the family Asteraceae, with a self-supporting growth habit. It has simple, broad leaves and purple flowers. It is a photoautotroph.
Definition: The minimum tolerable temperature is the lowest temperature recorded in the plant’s historical range. If this is not available, the record low January temperature recorded at climate stations within the current geographical range of the plant is used. This definition does not apply to summer annuals.