carpogonial branch

例句：

1. 1. The plant has a carpogonial branch that grows from the baseof the stem.
   这种植物有一个从茎基部生长的萼片状分枝。
2. 2. The scientist observed the carpogonial branch and noted its unique shape.
   科学家观察了萼片状分枝，并注意到其独特的形状。
3. 3. Thecarpogonial branchis an important part of theplant's structure.
   萼片状分枝是植物结构的重要组成部分。