B. formosa

B. formosa may refer to:


 * Banksia formosa, a shrub endemic to Western Australia
 * Belvosia formosa, a tachina fly
 * Bematistes formosa, an African butterfly
 * Billbergia formosa, a New World plant
 * Bucculatrix formosa, a ribbed cocoon maker
 * Burmeistera formosa, a plant endemic to Ecuador