Harrisia in Bull. Torrey Bot. Club 35: 561. 1909 sec. Franck & al. (2013a)
- Type: Harrisia gracilis
- =Eriocereus in Boll. Reale Orto Bot. Palermo 8: 238. 1909 syn. sec. Hunt (2006)
- Type: Eriocereus tortuosus
- =Roseocereus in Blätt. Kakteenf. 1938(6): 21. 1938 syn. sec. Hunt (2006)
- Type: Roseocereus tetracanthus
Harrisia was confirmed as monophyletic by Franck (2012), with a revised infrageneric classification published shortly after (Franck & al. 2013a). The recently described genus Estevesia P. J. Braun was not included in any molecular study so far. It was provisionally placed in the synonymy of Harrisia by Nyffeler & Eggli (2010). For synopsis see Franck (2012); further phylogenetic studies see Franck & al. (2013b).