this is the hybrid of V. pulverulentum and V. sinuatum, which is calles Verbascum x hybridum Brot. Unfortunately, the site does not know this hybrid (which is very well known, in fact). Further information here : https://www.researchgate.net/publication/370204469_Molenes_hybrides_de_France_2_-_Verbascum_hybridum_Brot_V_pulverulentum_Vill_V_sinuatum_L
En los campos de Eras Bajas y San Anton