A flower or plant that naturally lacks sepals (the leaf-like structures that protect the flower bud and form the outer layer of the flower).
From Greek 'a-' (without) + Latin 'sepalum' (sepal) + '-ous' (full of). The botanical term describes plants missing this typical flower component.
Most flowers have sepals that look like little green leaves protecting the actual colorful petals, but asepalous flowers just let their petals hang out naked—it's pretty rare in nature!
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