A large, often colorful bract that encloses or subtends a spadix or other type of inflorescence. The spathe may be showy and petal-like, serving to attract pollinators to the small flowers within.
From Greek 'spathe' meaning 'broad blade' or 'paddle,' referring to the broad, flat shape of this bract. The term entered botanical vocabulary in the 18th century to describe the distinctive leaf-like structures that protect and display flower clusters in certain plant families.
Spathes are nature's false advertising at its finest! What looks like a giant colorful petal on plants like peace lilies or anthuriums is actually a modified leaf designed to make the tiny, inconspicuous real flowers more attractive to pollinators - it's like putting up a billboard to advertise a small shop.
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