Quote:
Originally Posted by Connie Star
So, it's sort of the petals cupping around the lip? Is it a color or a form thing?
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Both. It's when the lateral petals take on lip characteristics (colour, shape, or both), or the lip takes on characteristics of the lateral petals, or rarely when the sepals take on lip-like or petal-like characteristics. The term covers a range of abnormalities of petal/lip structure wherein the flower loses it's bilateral symmetry and sortof reverts to a more lily/iris like radial symmetry.
THink of it this way: orchids are evolutionarily related to lilies, but have evolved one of the petals (there are exceptions) into a pollinator landing pad. It's not all that unusual that once in a while you get a plant where the stability of that gene is a touch dodgy. Now, some pelorics are stable and reliably produce flowers of some degree of pelorism, and sometimes you get a plant that will produce normal flowers, peloric flowers,and halfway betweens, sometimes even on the same spike.
Complex organisms with complex biology.
-Cj