There are different types of flowers, each with their own unique genetics that sets them apart from others. Each of these has a "botanical name", which identifies, classifies and separates it from other plants.
While there is an entire classification system for each plant most horticulturists, botanists, landscapers and farmers simply use the last two or three parts of the naming protocol - the Genus and Species.
The use of the Genus and species can be compared to identifying a person by his surname and then his forename.
Flower Common Name & Scientific Name: Shasta Daisy, family, Asteraceae. Scientific Name: Leucanthemum x superbum
The botanical name for colocasia is Colocasia esculenta.
The botanical name of Gongura is Hibiscus sabdariffa.
The botanical name for periwinkle is Catharanthus roseus.
The botanical name of Marconi wheat is Triticum aestivum.
Helianthus is the botanical name for the Sunflower.
There are two possible plants:-Crossandra infundibuliformis-Dichelostemma ida-maia
Tabernaemontana coronarea is the botanical name of tagar flower.
Corpse flower. The botanical name is Amorphophallus titanum.
Bougainvillea glabra
The Goldenrod (Botanical name: Solidago) has gold in it.
botanical name for it is Belamcanda chinensis
Chrysanthemum indicium is the botanical name for the Godavari flower. The flower is commonly known as a chrysanthemum. The name for the chrysanthemum in Nepal is Godavari flower.
Nymphaea Caerulea
Ulmus (botanical/ genus name of Elm trees)
Dalbergia sissoo
Depends what your nation is. This is an international website. Re-ask the question with the name of your country.