Four-o'clock, or Marvel of Peru, a flowering plant native to tropical America. The flowers open in the late afternoon on sunny days, earlier on cloudy days. The four-o'clock is a perennial herb, but is often grown as an annual in cool regions. It quickly grows 18 to 36 inches (45 to 90 cm) tall, and flowers abundantly in late summer. The flowers are red, yellow, white, or lavender; they are trumpet shaped, up to two inches (5 cm) long and about one inch (2.5 cm) wide at the mouth.

The four-o'clock is Mirabilis jalapa of the four-o'clock family, Nyctaginaceae.

The four-o'clockThe four-o'clock is a perennial plant with colorful flowers from tropical America.