Plant
              
                - Biennial, grown as annual crop
 
                - Up to 24" tall
 
              
            
          
         
        
          
            
            
              Stem
              
            
          
         
          
            
            
              Leaf
              
                - Size variable
 
                - Broadly ovate
 
                - Round lobes with smaller lobes at base
 
                - Bluish-green with thick, white midrib
 
              
            
          
         
        
          
            
            
              Head
              
                - Cluster of flower buds
 
                - Blue-green when immature
 
                - Edible, harvested before buds open to yellow flowers