The leaves of morning glories are large and heart-shaped, measuring approximately 3 to 6 inches (7.5 to 15 cm) in length and width. They often appear lobed or divided but are rarely compound. The leaf surface is smooth, with a vibrant green coloration that can darken with maturity. The veins are prominent and radiate from the leaf base, creating a symmetrical pattern. The leaves have a delicate, slightly glossy texture, underscored by their notable heart-shaped outline.

The flowers of morning glories are trumpet or funnel-shaped and come in various hues, including blue, purple, red, pink, and white. They typically measure between 2 to 4 inches (5 to 10 cm) in diameter, making them quite conspicuous. The petals are fused, forming a singular tubular structure that flares outwards. These blooms often exhibit a mild, pleasant fragrance and peak during the summer months, attracting pollinators. Their vibrant colors and unique shape are key identifiers.

The stem of morning glories is typically twining, occasionally prostrate or floating. It can be either smooth (glabrous) or covered with fine hairs (pubescent). The texture of the stem is generally flexible and its color can range from green to slightly reddish. It varies in thickness, generally being slender, around 0.1-0.4 inches (2.5-10 mm) in diameter. Branching is often limited, with stems mainly growing in a vine-like manner. These key characteristics help in identifying morning glories.

The fruit of morning glories manifests as globular to ovate capsules, characteristically with 4 to 6 valves, or occasionally splitting in an irregular pattern. These capsules are dry at maturity, and when they open, they reveal seeds that are usually glabrous. The husk-like structure is typically light brown to beige upon maturation, offering a modest contrast to the verdant foliage. Their dimensions can vary, but they typically fall within a range of 0.5 to 1 inch in diameter (about 1.3 to 2.5 cm). These traits are key identifiers for the species’ fruit.