Clerodendrum cyrtophyllum, commonly known as the Mayflower Glorybower, is a species of flowering plant in the mint family, Lamiaceae. This shrub or small tree is recognized for its attractive foliage and floral displays, making it a noteworthy ornamental plant. The Mayflower Glorybower typically grows as a deciduous or semi-evergreen shrub, reaching heights of 1 to 3 meters, though it can occasionally develop into a small tree up to 6 meters tall. Its growth habit is generally upright and spreading. The leaves are a prominent feature, being ovate to elliptic in shape, measuring 5 to 15 cm in length and 3 to 8 cm in width. They are arranged oppositely on the stems and possess a glossy, dark green surface with prominent venation. The leaf margins are entire or slightly toothed. The bark is smooth and grayish-brown on mature stems. During its blooming period, Clerodendrum cyrtophyllum produces clusters of flowers, typically in terminal panicles. Individual flowers are tubular, with five petals that are often white or pale pink, and a prominent, often reddish or purplish, calyx. The flowers are fragrant and attract pollinators. Following successful pollination, the plant develops small, globose fruits that are typically dark blue to black when ripe, often subtended by the persistent, colorful calyx. The native distribution of Clerodendrum cyrtophyllum is primarily in Southeast Asia, including regions of China, Taiwan, and Vietnam. It thrives in a variety of natural habitats, often found in forests, woodlands, and along stream banks, preferring moist, well-drained soils. In cultivation, it is adaptable to a range of soil types but performs best in fertile loam. It prefers full sun to partial shade and requires regular watering, especially during dry periods. While it can tolerate some frost, it is best suited to warmer climates and may benefit from protection in colder regions. While not widely cultivated for specific economic purposes, Clerodendrum cyrtophyllum holds ornamental value due to its attractive foliage and showy flowers. Its ecological role involves providing nectar for pollinators and serving as a food source for some wildlife through its fruits. There is limited scientifically documented evidence regarding significant medicinal, culinary, or agricultural uses for this specific species. An interesting characteristic of Clerodendrum cyrtophyllum is its ability to adapt to different light conditions, though flowering is generally more profuse in sunnier locations. The persistent, often brightly colored calyces that surround the developing fruits can add to the plant's visual appeal long after the petals have fallen, contributing to its ornamental interest throughout much of the year.