aecidium

Aecidium is a genus of rust fungi in the Pucciniales order. The widespread genus is estimated to contain about 600 species.

1. The aecidium forms on the leaves during the infection.
   感染过程中，孢子囊在叶子上形成。
2. Scientists studied the aecidia to understand the rust fungus life cycle.
   科学家研究了孢子囊以了解锈菌的生命周期。