👉 The term "spermatangium" refers to a type of seed or pollen grain that is produced by a plant during its reproduction process. It is typically found in the seeds of flowering plants, such as wheat and corn, but can also be found in other plant species like soybeans, beans, and sunflowers. The spongy, green or brownish material within the spermatangium serves as the seed coat, protecting the embryo inside from外界环境的影响。