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Zinnia is a genus of 20 species of annual and perennial plants of family Asteraceae, originally from scrub and dry grassland in an area stretching from the American Southwest to South America, but primarily Mexico, and notable for their solitary long-stemmed flowers that come in a variety of bright colors. Read more about it here.

Plumbago auriculata, also called Plumbago capensis, Blue plumbago, Cape plumbago or Cape leadwort, is a well known houseplant originally from South Africa. Plumbago auriculata grows fast and to 1.8 meters (6 feet) tall. It has light blue to blue flowers and also variations with white (Plumbago auriculata var. alba) or deep blue (Plumbago auriculata ‘Royal cape’) flowers. The leaves are green and grow to 5 cm (2 in) long. It grows well in a container outdoors and can be watered freely in the summer. To get the flowers to appear, the plumbago requires a warm place in full sun or partial shade.

Torenia fournieri (Wishbone flower) is a plant in the figwort family, Scrophulariaceae. It is a herbaceous plant with opposite, simple leaves, on green, flexible stems. The flowers are blue, purple, or white, borne in summer.

Cosmos is a genus of about 20-26 species of annual and perennial plants in the family Asteraceae, native to scrub and meadow areas in Mexico (where the bulk of the species occur), the southern United States (Arizona, Florida), Central America and northern South America south to Paraguay.

They are herbaceous perennial plants growing 0.3-2 m tall. The leaves are simple, pinnate, or bipinnate, and arranged in opposite pairs. The flowers are produced in a capitulum with a ring of broad ray florets and a center of disc florets; flower color is very variable between the different species. The genus includes several ornamental plants popular in gardens.

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The Hibiscus and this group of ants is having a mutual relationship. The ants protect the plant from potential pests. The Hibiscus in return provides the ants its nectar which is needed by the ants for nourishment to them and their young.