Serjania pygmaea (Radlk.) Ferrucci Medina Serjania pygmaea (Radlk.) Ferrucci Medina in Acta Bot. Mex. 104: 21-28, f. 1-3. 2013 sec. Calónico-Soto 2019≡Cardiospermum pygmaeum Radlk. in Feddes repert. Spec. Nov. Regni Veg. 17: 361. 1921 syn. sec. POWO 2019