Sonata Carmine Flowers also called as "Dazzle Cosmos" plants are varieties of Cosmos bipinnatus plants. Cosmos plant has many varieties or hybrid in various colors which Red Scarlet and Purple Plants native to mexico and America and  introduced plant to Sri Lanka. See Also  Pink Cosmos
Cosmos flowers are closely related to the Marigold Flowers.

Common Classification
Common Names	Sonata Carmine, Cosmos, Garden Cosmos, Dazzle Flowers
Scientific Name	Cosmos bipinnatus var. exaristatus
Sinhalese Name	Ata pethiya (In Sinhalese also called to  Tagetes lemmonii Merigold Flower)
Scientific Classification
Family	Asteraceae
Genus	Cosmos
Species	C. bipinnatus var. exaristatus
Synonym	Cosmos hybridus, Cosmea tenifolia , Coreopsis formosa
Ecology
Category	Ornamental
Growth Habit	Small -Shrub	Status - Native	Introduced
Duration	Perennial	Status (Controlling)	Cultivate
Propriety
Culinary / Edible	No	Other use	n/a
Use as Herb	No	Poisoned / Toxin	No
Identification
Dazzle Flower Cosmos bipinnatus hybrid with Cosmos atrosanguineus		Cosmos Dazzle Leaves .
Fruits