Staminode
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Sometimes, the staminodes are modified to produce nectar, as in the witch hazel (Hamamelis).
Staminodes can be a critical characteristic for differentiating between species, for instance in the orchid genus Paphiopedilum, and among the penstemons.
In the case of cannas, the petals are inconsequential and the staminodes are refined into eye-catching petal-like replacements.
A spectacular example of staminode is given by Couroupita guianensis, a tropical tree growing in South America also known as the cannonball tree.
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