Mammillaria incurva Placement status: name of verified uncertain applicationMammillaria incurva Scheidw. in Bull. Acad. Roy. Sci. Bruxelles 6: 6. 1839 sec. Britton & Rose 19231≡Cactus incurvus (Scheidw.) Kuntze, Revis. Gen. Pl. 1: 260. 1891 syn. sec. Britton & Rose 192311. Britton, N. L. & Rose, J.N. 1923: Cactaceae 4Content