Plant
              
                - Biennial, grown as annual crop
 
                - Up to 24" tall
 
              
            
          
         
        
          
            
            
              Leaf
              
                - Size variable
 
                - Broadly elongated
 
                - Wavy edges but not lobed
 
                - Green with thick, white midrib and veins
 
                - Alternate leaf arrangement but crowded at base
 
              
            
          
         
        
          
            
            
              Head
              
                - Edible cluster of undeveloped stems 
 
                - Creamy to yellowish-white if covered from light exposure
 
                - Some cultivars pinkish or orange