Fig. 5
Microphotographs of pollen grains (all pollen pictures are on the same scale size). a J. sabina pollen grains showing variability in pollen sizes. b J. thurifera pollen grains showing size variation representative of most pollen from this species. c J. thurifera pollen grain showing a large size, considered as possibly unreduced. d Aborted pollen grains (arrows) produced by the potential hybrid JTS14. e JTS14 pollen grains showing various sizes. f, g, and h show JTS19 pollen grains of different sizes. h Pollen grain with a large size and considered as possibly unreduced