Type: Ex cult. in coll. R. Ehlers, July 1992, R. Ehlers s.n. (holo WU). To that plant the following collection data were attached: Guatemala, Depto. San Marcos, near the village Union Juarez not far from the Mexican border, ca. 800 m s. m., 1991, leg. U. Feldhoff s.n. (fieldbook entry). Paratype: Ex cult. in Bot. Garden Göttingen (GOET, Germany), June 2004, J. Lautner s.n. (WU). To that plant the following data were attached: „Guatemala, Depto. Huehuetenango, leg. Uwe Feldhoff“ and was cultivated there as „T. stoltenii“. Additional collections: Mexico, Chiapas, on the Guatemala border, at the foot of the Tacaná volcano. ca. 2200 m s. m, Heidelberg Bot. Garden Nr. Rauh 73452, leg. R. Wülfinghoff Nr. M92/349, 1992. Guatemala La Mesilla, probably leg. W. Welz s.n. (cult. in HBG).