Which broadleaf winter annual has egg-shaped leaves and small, white flowers with deeply notched petals?

The broadleaf winter annual described in the question is indeed common chickweed. This plant is characterized by its egg-shaped leaves, which are typically smooth and glossy. The distinctive small, white flowers with deeply notched petals further help to identify common chickweed. The notched petals create a unique star-like appearance when the flowers are fully open, making them quite recognizable.

Additionally, common chickweed thrives in cooler temperatures, particularly in the winter months, and is often found in moist, shady areas. This growth pattern and morphology contribute to its classification as a winter annual.

The other options do not match the description provided. Field bindweed, for example, has trumpet-shaped flowers and arrowhead-shaped leaves, which differs significantly from the features of common chickweed. Henbit has distinct hairy leaves and purple flowers, and crabgrass is a summer annual grass rather than a broadleaf, with a completely different leaf structure and flowering style. Understanding these specific traits is essential for correctly identifying these plants in the field.