Cascabela gaumeri (Hemsl.) Lippold Cascabela gaumeri (Hemsl.) Lippold in Feddes Repert. 91: 53. 1980 sec. Juárez-Jaimes & al. 2007≡Thevetia gaumeri Hemsl. in Hooker's Icon. Pl. 16: pl. 1517. 1886 syn. sec. The Plant List 2013