B. grandis may refer to: * Baeckea grandis, a shrub species in the genus Baeckea * Banksia grandis, the bull banksia, giant banksia or mangite, a common and distinctive tree species found in South West Western Australia * Beishanlong grandis, a giant ornithomimosaurian dinosaur from the Early Cretaceous of China * , a flowering plant species in the genus Boehmeria * , a plant species in the genus Buchenavia