The composition of native, alien, and invasive vascular plant floras of the Eastern U.S. with respect to growth habit and duration [46].

*P<0.05; **P<0.01; ***P<0.001.
Percentages are relative to the total flora counts for each group. Native flora statistics do not include infraspecific taxa or hybrids. Bold counts are statistically significant outliers in Pearson chi-square analysis, comparing the alien flora counts with the native flora, and the invasive flora counts with the alien flora. Tests were performed separately for the three classifications indicated (specific growth forms, herbaceous vs. woody, and duration).