What happens on the floor of a deciduous forest in spring?

In the spring, the floor of a temperate deciduous forest undergoes a period of rapid biological activity as rising temperatures and rainfall stimulate new growth. Because the trees above have not yet developed their full canopy, abundant sunlight reaches the forest floor, creating a brief, shade-free window that herbaceous plants must exploit to survive.12

Many of these ground-level plants, known as spring ephemerals, utilize underground energy-storage organs—such as bulbs, corms, or fleshy rhizomes—to grow and bloom quickly before the trees leaf out and cast heavy shade. These plants often produce strong, pointed shoots capable of emerging through the thick layer of leaf litter deposited during the previous autumn. As a result, the forest floor is typically covered by a green carpet of foliage and colorful flowers during this time. Once the tree canopy fully develops, the light available to the understory is drastically reduced, causing this ground cover to decline.21