Hapalorchis dominicii(Orchidaceae, Spiranthinae), a New Species from the Colombian Andean Cloud Forest

A New Species of Brachystele (Spiranthinae, Orchidaceae) with Nonresupinate Flowers from Central East Argentina

“…Resupination in orchids is known as the inversion or torsion of 180° in the orientation of the flower (Dworaczek and Claßen-Bockhoff 2016). The condition of having nonresupinate flowers in Spiranthinae is uncommon and occurred independently in different Central and South American genera (Garay 1982; Steyermark and Holst 1989; Górniak et al 2006; Salazar and Jost 2012; Parra-Sánchez et al 2016). This feature appears in species belonging to the monospecific genera Quechua Salazar & L.Jost from the Andes of Ecuador and Perú (Salazar and Jost 2012) and Aracamunia Carnevali & I.Ramírez from the Venezuelan Guayana (in Steyermark and Holst 1989).…”

“…In addition, the tropical American genus Hapalorchis Schltr. and its sister Brazilian genus Pseudoeurystyles Hoehne (Salazar et al 2018) have been reported to have several species with nonresupinate flowers (Szlachetko et al 2001; Górniak et al 2006; Parra-Sánchez et al 2016).…”