This photo shows the pollen of a guava (Genus: Psidium) on the vein of guava leaf. Pollen, the male gametophyte of a plant encased in a pollen wall, can be dispersed through several means such as wind or animals. Pollen is vital to the fertilization of the plant because without it, the female ovule will not be able to transform into a fertilized seed. The guava is a very tasty fruit that is native to the Americas. However, there is a saying not to drink water after eating guava because it ma cause strep throat.