whole plant flowering stage FL.00 first flower(s) open stage 6.00 1st flowers on main stem open in soybean (related) 7.01-anthesis beginning in Triticeae (related) 7.01-anthesis beginning in barley (related) 7.01-anthesis beginning in oat (related) 7.01-anthesis beginning in wheat (related) FL.00 first flower(s) open in Solanaceae (related) PO:0007026 Stage R1 Open flower at any node on the main stem (related) The stage at which the first flower(s) open. These first flowers are not necessarily the oldest flowers in the inflorescence. In some cereal plants the flowering starts in the middle of the inflorescence. This stage refers to the whole plant. first open flower in Arabidopsis (related) plant_structure_development_stage