night-blooming cereus
noun
                                                                                                                            
                                                            night-bloom·ing cereus
                    
                                                                                                              
                                                                                                                                  ˈnīt-ˌblü-miŋ- 
                                                      
                                                          
            
            
               plural night-blooming cereus or night-blooming cereuses            
        
    
                                
              
          
                                                      : any of several cacti with usually large, white, fragrant, night-blooming flowers: such as                                      
                
                    
        a
    
          
                                          
              
          
                                                      : a sprawling or climbing cactus (Selenicereus grandiflorus) found from Mexico to South America that has spiny, ribbed stems and pink to whitish spiny fruits                                      
                
                    
        b
    
          
                                          
              
          
                                                      : an erect or sprawling slender-stemmed, thorny cactus (Peniocereus greggii synonym Cereus greggii) that is native to the southwestern U.S. and adjacent parts of northern Mexico and has spiny red fruits                                      
                
                    
        c
    
          
                                          
              
          
                                                      : any of several cacti (genus Hylocereus) including one (H. undatus) cultivated especially for its usually pink- or red-skinned fruit   see dragon fruit                                      
                
                    
        d
    
          
                                          
              
          
                                                      : an epiphytic cactus (Epiphyllum oxypetalum) of Mexico and Central America that has flattened, leaflike stems with wavy edges and is often grown as a houseplant or garden plant                                      
                
Note: The cacti known as night-blooming cereus are also known as Queens of the Night.
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  Merriam-Webster unabridged




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