The common name for Pennisetum purpureumis _ grass
Answer Details
Pennisetum purpureum is commonly known as elephant grass (also called Napier grass). It is a tall, robust tropical grass that can grow up to 3-4 metres in height, hence the name "elephant" - reflecting its large size. It is widely cultivated in West Africa and other tropical regions as a fodder crop for livestock due to its high biomass yield.
The other options refer to different grass species:
Bahama grass is the common name for Cynodon dactylon, a low-growing, creeping grass used for lawns and pastures.
Guinea grass is Megathyrsus maximus (formerly Panicum maximum), another important tropical pasture grass but a different species.
Carpet grass is Axonopus compressus, a low-growing grass used for ground cover in moist tropical areas.
Exam tip: Learn the botanical and common names of the most important tropical forage grasses - elephant grass (Pennisetum purpureum), guinea grass (Panicum maximum), bahama grass (Cynodon dactylon), and carpet grass (Axonopus compressus). These appear frequently in JAMB questions.