Morphological features of Amaranthus spp. and cockscomb. (a) GA-1 (Giant Amaranthus-1 (A. cruentus)); (b) GA-2 (Giant Amaranthus-2 (A. cruentus)); (c) GrA (Green Amaranthus (A. viridis)); (d) TA (Thorny Amaranthus (A. spinosus)); (e) RA (Red Amaranthus (A. tricolor)); (f) CC (cockscomb (Celocia cristata)). A mature inflorescence, adaxial and abaxial views of a fully grown leaf, a typical shoot-top harvested for cooking, and a whole plant are shown for each species/cultivar. The scale bar represents 1 cm.