Just in case you think that all yellow flowers have this property -- no flower was damaged in the process of this shot; it was just attached to the tripod, not killed -- then under ultraviolet light, look at that.
I tilfelle du tror at alle gule blomster  har denne egenskapen - ingen blomster ble skadet prosessen med å ta dette bildet; den ble bare festet til stativet, ikke drept - i ultrafiolett lys, se på dette.