Which term refers to the perianth when the calyx and corolla are not distinct?

Which term refers to the perianth when the calyx and corolla are not distinct?

• A. Perianth
• B. Apocarpous
• C. Syncarpous
• D. Placentation

Answer: (A)

The outer floral envelope is called the perianth. It covers the whole non-reproductive part of the flower and includes both the calyx (sepals) and the corolla (petals). When these two parts are not distinct, you still refer to that outer covering as the perianth, since it remains the collective envelope of the flower. In many contexts, people use the term tepals to indicate that sepals and petals aren’t separate, but among the given terms, perianth is the correct umbrella name for the entire outer part. The other terms describe different aspects of the flower’s reproductive structure—apocarpous and syncarpous relate to whether the carpels are separate or fused, and placentation describes how ovules are arranged inside the ovary—so they don’t fit the question about the perianth.

The outer floral envelope is called the perianth. It covers the whole non-reproductive part of the flower and includes both the calyx (sepals) and the corolla (petals). When these two parts are not distinct, you still refer to that outer covering as the perianth, since it remains the collective envelope of the flower. In many contexts, people use the term tepals to indicate that sepals and petals aren’t separate, but among the given terms, perianth is the correct umbrella name for the entire outer part. The other terms describe different aspects of the flower’s reproductive structure—apocarpous and syncarpous relate to whether the carpels are separate or fused, and placentation describes how ovules are arranged inside the ovary—so they don’t fit the question about the perianth.