Koellensteinia spiralis Gomes Ferreira & Menezes (1997a: 87)

Thiago E. C. Meneguzzo, José F. A. Baumgratz & Cássio Van Den Berg, 2015, Taxonomic studies in the Aganisia complex (Orchidaceae, Zygopetalinae), Phytotaxa 238 (1), pp. 1-39 : 21

3.10. Koellensteinia spiralis Gomes Ferreira & Menezes (1997a: 87) .

Koellensteinia spiralis Gomes Ferreira & Menezes (1997b: 258) , nom. illeg. Koellensteinia spiralis Gomes Ferreira & Menezes (1998: 114) , nom. illeg. Type:— BRAZIL. Bahia: Feira de Santana, ex hort., March 1987, Silva s.n. (holotype UFP 17576!)

Etymology:— From Latin, spiralis , helicoidal, in reference to the spiralled inflorescence.

Selected examined materials:— BRAZIL. Bahia: Entre Rios, 17 September 2009, Roque et al. 2248 (ALCB); 3 July 2010, Roque et al. 2844 (ALCB); 23 December 2012, Popovkin 1322 (HUEFS); 3 June 2013, Popovkin 1452 (HUEFS).

Distribution:— Northeastern Brazil: Bahia. TDWG code: 84 BZE-BA.

Diagnostic characters:— Koellensteinia florida and K. spiralis are closely related species and differ from other species of the genus in being large-sized plants (50–90 cm tall) with short secondary racemes and solitary flowers appearing in sequence. Koellensteinia spiralis differs from K. florida in its spiral inflorescence vs. upright, secondary racemes along all distal part vs. close to it with a lip with lateral lobes and midlobe oblong vs. obtuse.