What is the main characteristic of the seeds of hardwood?

The main characteristic of hardwood seeds is that they are typically larger and have a more complex structure compared to softwood seeds. Hardwood seeds, such as those from oak and maple trees, often possess a hard outer coat and may have a fleshy or winged structure to aid in dispersal. Additionally, they generally contain more nutrients to support the growth of the seedling, allowing for better establishment in various environments.