Spontaneous Hybridization between Pinus mugo and Pinus sylvestris at the Lithuanian Seaside: A Morphological Survey
Figure 5
Species mean values for needle anatomy traits: stomata row number in the abaxial (a) and adaxial (b) needle surface; stomata number per 5 mm stomata row (c); index of stomata rows (abaxial/adaxial). The species which were significantly different at 0.05 level are filled with different pattern (based on Tukey LSD test in ANOVA). M is P. mugo (40 needles from 4 trees were studied); S P. sylvestris (240 needles from 24 trees); H M × S putative hybrids P. mugo × P. sylvestris (group B in Table 2; 110 needles from 11 trees studied); H S × M hybrids P. sylvestris × P. mugo (group A; 80 needles from 8 trees). The error lines indelicate the standard errors (calculated from needle level). Mean values are given above the bars.
