Sprague 1908 - Decades Kewenses. Plantarum Novarum in Herbario Horti Regii Conservatarum. Decas LI (1908) Decades Kewenses. Plantarum Novarum in Herbario Horti Regii Conservatarum. Decas LI. Bulletin of Miscellaneous Information (Royal Gardens, Kew) 1908(10): 445. doi: 10.2307/4113196.
There is no corrections for Columnea guatemalensis yet.