Onion Small 249×320 Medium 499×640 Large 798×1024 Download TIFF Original 1870×2400 | (1.8 MB) Description Pictured is an onion in flower. The flowers bloom in early summer. Keywords onion, onion flower Galleries Flowers and Shrubs: N-O Source: L. H. Bailey Standard Cyclopedia of Horticulture (New York, New York: The MacMillan Company, 1917)