Habenaria

Batista, João A. N., Cruz-Lustre, Gabriela, do Vale, Aline A. & Bianchetti, Luciano B., 2023, Checklist and molecular phylogenetics reveal three taxonomic novelties in Habenaria (Orchidaceae, Orchidoideae) from Chapada dos Veadeiros, Goiás, Brazil, European Journal of Taxonomy 891, pp. 51-86 : 68-70

Key to the Brazilian species of Habenaria with the petal anterior segment inserted above the base of the posterior segment

1. Pedicellate ovary 19–28 mm long; dorsal sepal 10–14 mm long; petal anterior segment 20–33 mm long; spur 16–21 mm long.................................................................................. H. rodriguesii Cogn.

– Pedicellate ovary 12–21(–30) mm long; dorsal sepal 5–10 mm long; petal anterior segment 8–16 mm long, occasionally absent; spur 8.5–17 mm long............................................................................... 2

2. Lip lateral segments erect (turned upwards)...................................................................................... 3

– Lip lateral segments deflexed (turned downwards) ........................................................................... 4

3. Pedicellate ovary 19–21(–30) mm long, strongly arched; dorsal sepal broadly elliptical when flattened; petal anterior segment 11–16 mm long; spur 13–17 mm long, more or less genuflexus; restricted to the Chapada dos Veadeiros, State of Goiás, Brazil.................................. H. proiteana sp. nov.

–. Pedicellate ovary 12–18 mm long, slightly arched; dorsal sepal ovate or elliptical when flattened; petal anterior segment (0) 8–12 mm; spur 8.7–10.3 mm long, more or less straight; restricted to the Serra Gaúcha in the State of Rio Grande do Sul, Brazil...................................................................... ..................................................................................... H. australis J.A.N. Bat., A.A. Vale & Menini

4. Pedicellate ovary erect, more or less parallel with the rachis; dorsal sepal ovate or elliptical not reclinate, covering the gynostemium; lateral sepal 2–2.5 mm wide; lip lateral segments deflexed, longer than the median segment; anther canals and rostellum side-lobes held between the anther loculi; viscidia united; widely distributed from northern South America to southern Brazil.................................... ................................................................................................................. H. secundiflora Barb.Rodr.

– Pedicellate ovary perpendicular to the rachis; dorsal sepal obovate, partially reclinate, not covering the gynostemium; lateral sepals 3–4 mm wide; lip lateral segments reflexed, about the same size as the median segment; anther canals and rostellum side-lobes projected beyond the anther loculi; viscidia separated; restricted to the Chapada Diamantina in the State of Bahia, Brazil...................... ............................................................................................................................. H. meeana Toscano