Turnera subulata
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Like most other *Turnera*, this species is [heterostylous](/wiki/Heterostyly "Heterostyly"), with two [morphs](/wiki/Polymorphism_%28biology%29 "Polymorphism (biology)"). The "pin" morph has long [styles](/wiki/Gynoecium "Gynoecium") in its flowers, while the "thrum" morph has short styles. Both morphs produce the same amount of [pollen](/wiki/Pollen "Pollen"). One study reported that during pollination, pin flowers receive more pollen from thrum flowers than from other pin flowers. The genes that cause this dimorphism in style size are the subject of current research. So far, it has been established that short styles contain proteins, [polygalacturonases](/wiki/Polygalacturonase "Polygalacturonase"), that are absent in long styles.


What is heterostyly?