That’s right, virtually all of the dandelions in your yard and your office park have not 16 but 24 chromosomes, and their ovules don’t need or accept pollen from other dandelions. Instead, they reproduce via a process called apomixis (or technically agamospermy in angiosperms) whereby ovules are created without meiosis, are therefore fully triploid right from the get-go, and set to develop into seeds without fertilization.
But some dandelions are sexual diploids and reproduce according to the standard angiosperm model. But to see this, we should leave
And now it gets even weirder. Some portion of the asexual triploids still produce viable pollen. Their sperm cells are diploid, and when they fertilize sexual diploid dandelions, they combine with the haploid ovule to create new asexual, parthenogenetic triploid lines. So new triploid lines are continually being created. Some of these lines exhibit high fitness and expand their ranges either locally, or when their seeds are introduced to a new locale, such as