Abstract:The length, width and the chloroplast numbers in stomatal apparatus, and the pollen sizes weremeasured of three species of genus Hibiscus (H. schizopetalus, H. mutabilis, H. rosa-sinensis) and three cultivars (H. rosa-sinensis L. cv. Double Rainbow, cv. Flavo-plenus, and cv. Carminatus). The characters of stomatal and pollen size are positively related with the chromosomal number and ploidy of these plants, which could be helpful for the ploidy determination of Hibiscus plants. However, the pollen size of these species and cultivars diverse greatly. The chromosome numbers and ploidy of hibiscus are discussed.
