Table 2.

Means and standard deviations of altitudes of pure pentaploid (5x), pure hexaploid (6x) and mixed populations (5x + 6x) of Pilosella officinarum in the Western Carpathians and adjacent part of Pannonia

Ploidy level	N	X ± s.d.
5x	86	546 ± 292a
6x	40	370 ± 189b
5x + 6x	21	513 ± 253ab

Only populations with two or more analysed plants were included. The tetraploids and heptaploids were, according to their comparatively low abundance, excluded from this analysis. Altitudinal ranges and means are given in metres above sea level. N, Total number of populations; X, mean; s.d., standard deviation. Means in columns sharing the same superscript letters are not significantly different (Tukey's pairwaise comparisions, P = 0·003, F = 6·19).