Nyctaginia capitata, commonly known as the nocturnal mirabilis or heartleaf four o'clock, is a flowering plant species native to the American Southwest and Mexico. It belongs to the family Nyctaginaceae and is characterized by its distinctive heart-shaped leaves and showy, trumpet-shaped flowers.
The nocturnal mirabilis is a perennial herbaceous plant that typically reaches a height of 1 to 3 feet. Its leaves are opposite, ovate to lanceolate in shape, and have a pleasing heart-like appearance. They are arranged alternately along the stem and have a slightly sticky texture.
The flowers of Nyctaginia capitata bloom in the late afternoon or evening, hence its common name "four o'clock." They are fragrant and borne in clusters, with each flower measuring around 1 to 2 inches in length. The petals are typically white or pink, but can also exhibit shades of red or purple. These captivating blooms attract pollinators, such as moths and bees, which are active during the evening.
Nyctaginia capitata is a hardy plant that thrives in dry and arid environments. It prefers well-drained soil and full sun exposure but can tolerate some shade. It is often found in desert regions, scrublands, and rocky slopes. The plant's ability to flower during the late afternoon and evening allows it to conserve water during the hot daytime temperatures and take advantage of pollination from nocturnal insects.
Due to its attractive flowers and foliage, Nyctaginia capitata is commonly cultivated as an ornamental plant in gardens and landscapes. It adds beauty and interest to xeriscapes and arid gardens, providing a touch of color and fragrance when many other plants are not in bloom.
