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Table 2 Size measures carried out on 30 pollen grains from the s-pops SS and VB (Fig. 1). Symbols indicate mean length of polar axis in μm (P), mean equatorial diameter in μm (E) and standard deviation (σ)

From: Staying alive on an active volcano: 80 years population dynamics of Cytisus aeolicus (Fabaceae) from Stromboli (Aeolian Islands, Italy)

Sample P ± σ P range (μm) E ± σ E range (μm) P/E
s-pop SS 21.4 ± 1.31 18–24.8 21.8 ± 1.45 18.8–24.8 0.98
s-pop VB 24.9 ± 3.09 18.8–29.9 26.4 ± 3.61 20.5–32.5 0.94