Aster

Four of nine assessed members are rated fire resistant; for the other five, the sources do not take a side. Those five do not count against asters, but they also cannot extend the resistant verdict across the genus.

The resistant members include Michaelmas-Daisy, Aster laevis, and smooth white aster, each rated on a handful of assessments. The Michaelmas-Daisy assessment says that “Most are old field natives” and records sun tolerance, some shade tolerance, and variable insect pests. Aster laevis is listed in a ground-cover section whose Firewise plants are generally described as low-growing, low-debris, and relatively moist. Smooth white aster keeps the ignitability score given to it in a Colorado State University table. Each detail remains specific to that member or its source context.

All nine assessed members are perennials in the Asteraceae family. The evidence supports choosing one of the specifically rated asters, but it does not make the genus name alone a fire-resistance guarantee.