Plant species are groups of plants that share common characteristics and can reproduce with one another. Each species has unique features, such as leaf shape, flower color, and growth habits. For example, the rose and the sunflower are two distinct plant species, each with its own traits and ecological roles. Understanding plant species is essential for biodiversity and ecosystem health. Different species contribute to the balance of nature, providing food and habitat for various animals. Conservation efforts often focus on protecting endangered plant species, like the California poppy, to maintain the richness of our planet's flora and support overall environmental stability.