In certain plants having separated sexes Kolreuter found that by crossing a species, in which the male flowers included a rudiment of a pistil, with an hermaphrodite species, having of course a well-developed pistil, the rudiment in the hybrid offspring was much increased in size; and this clearly shows that the rudimentary and perfect pistils are essentially alike in nature.
Honako hau aurkitu zuen Kölreuterrek sexu bereizidun landare batzuetan: lore arretan aztarna-pistiloa duen espezie bat gurutzatuz jakina denez pistilo ongi garatua duen espezie hermafrodita batekin, asko hazi zela tamainuz aztarna hori ondorengotza hibridoan; eta horrek garbi erakusten du aztarna-pistiloa eta garatua izaera berdinekoak zirela funtsean.