Which term refers to the outer floral envelope when the calyx and corolla are not distinct?

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Study for the Morphology of Flowering Plants Test. Enhance your understanding with multiple-choice questions, complete with explanations. Prepare for your exam!

Multiple Choice

Which term refers to the outer floral envelope when the calyx and corolla are not distinct?

Explanation:
The outer floral envelope is called the perianth. It includes the calyx (sepals) and the corolla (petals) as a whole, even when these two parts are not distinct from one another. In flowers where the calyx and corolla are indistinguishable, the individual parts are often described as tepals, but the envelope itself remains the perianth. The other terms refer to different floral features—monadelphous describes fused stamens, axile placentation describes how ovules are arranged inside the ovary, and polyandrous means many stamens—so they don’t describe the outer floral envelope.

The outer floral envelope is called the perianth. It includes the calyx (sepals) and the corolla (petals) as a whole, even when these two parts are not distinct from one another. In flowers where the calyx and corolla are indistinguishable, the individual parts are often described as tepals, but the envelope itself remains the perianth. The other terms refer to different floral features—monadelphous describes fused stamens, axile placentation describes how ovules are arranged inside the ovary, and polyandrous means many stamens—so they don’t describe the outer floral envelope.

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