Figure 3

Stamen, pollen, and orbicule micromorphology of Iris ruthenica (a–i) and I. uniflora (j–s). (a–d, j–n) Stained fertile (a,b) or sterile (j–l) pollen grains and their detailed sexine ornamentation; (e,f, o,p) dissected anther (inner part; e, o) and the occurrence of orbicules (f, p), respectively; (g–i, q–s) outer epidermis of anthers (g, q) and the occurrence of stomatal complex (h,i,r,s), respectively. All photographs were obtained by Bokyung Choi.