perigonnia
/ˌpɛrɪˈɡɒnɪə, ˌpɛrɪˈɡɒniə/Definitions
1. noun
A perigon is the distance from the center of a flower to the point of attachment of its leaves to the stem. This term is often used to describe a specific plant characteristic.
“The gardener studied the perigonnia of various flowers to better understand their growth patterns.”