Flowers consist of the styles (female bits) with two whorls of pollen bearing stamens, three whorls of reproductive structures in all. The styles are either the very lowest whorl inside the flower, (short style) with two whorls of stamens above, mid styled with whorls of stamens above and below, or long styled, with the female parts protruding from the flower and two whorls of stamens beneath
It’s a mechanism to ensure cross pollination and maintain genetic diversity. It makes oca breeding a little more complicated than some plants, especially seeing that it is usually octoploid, with 4 pairs of each chromosome instead of the usual single pair.
There are pictures in the group and on the forms to help you. We’re planning an information sheet and it will be available soon.
Diagram-
http://radix4roots.blogspot.fr/2009/08/flurry-of-flowers.html