For basic answer please check our previous answer on the scientific name of some common grassess using the link below.
I shall get a more extensive answer from the team and update it here.
The Elephant grass (Pennisetum purpureum) The botanical name of Elephant grass is Pennisetum purpureum, also known as Napier grass, or Uganda grass. It is a species of enduring tropical grass local to the African grasslands. It has low nutrient and water requirements, and that is why it can be found in uncultivated lands.
The Carpet grass (Axonopus compressus) The Carpet grass is an enduring, creeping, coarse-leaved grass. It grows better on wet, low soils in comparison with other grasses. This plant will grow well regardless of sun or shade but is less shade tolerant than Centipede and St. Augustine grass which has similarities with it. The Carpet grass may be planted by sprigs or seed.
The Water leaf (Talinum triangulare) Water leaf botanical name is Talinum Triangulare. It is a type of herb with an aqua-colored, very small sprout. Waterleaf is an edible leafy vegetable and is used in many traditional dishes in Nigeria. The Wild Sun Flower (Aspilia africana) The Wild Sun Flower is a kind of flowering plants in the Asteraceae family. The Wild Sun Flower (Aspilia africana) The botanical name of the Wild Sun Flower is Aspilia africana, and it is native to Latin America, West Africa, and Madagascar.