orientalis had the biggest pollen grains with 25.90 m polar axis and 21.46 m equatorial axis lengths, while Crambe orientalis subsp.
Polar axis is 25.90 m and equatorial axis 21.46 m.The colpus length is 17.07 m and the colpus width is 4.77 m.
Polar axis was 25.80 m and equatorial axis was 21.60 m.
isoblate-spheroidal, spheroidal and subprolate, radially symmetric, isopolar, tricolpate, reticulate, rarely tetracolpate, polar axis is 15.2-30.2 m and equatorial axis 12.5-27.1 m, outline is elliptic in the equatorial view and circular in the polar view.
Pollen morphology of the genus Clypeola (Brassicaceae), tricolpate rarely tetracolpate, prolate-spheroidal, subprolate to prolate, polar axis is 22.4-33.4 m and equatorial axis 19.2-23.9 m (Keshavarzi et al., 2012).
Size varies of Cornus mas pollen with the polar axis ranging from 21.54 to 27.36 [micro]m and equatorial axis from 21.31 to 26.72 [micro]m.
With the light microscope, at least 50 measurements are performed for each pollen feature (P: Polar axis, E: Equatorial axis, Clg: Length of colpus, Clt: Width of colpus, Plg: Length of porus, Plt: Width of porus, t: Apocolpium and Ex: Exine thickness).
The polar axis of Cornus mas's pollen grains ranges from 21.54 to 27.36 [micro]m and their equatorial axis ranges from 21.31 to 26.72 [micro]m.
(1971), the length of the polar axis is (P): 62.42 [micro]m and equatorial axis length (E) is 56.22 [micro]m for the pollen grains of C.