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 : 64

Key to the Brazilian species of Habenaria with a reduced spur

1. Pedicel shorter than the ovary; dorsal sepal ≤ 5 mm long................................................................. 2

– Pedicel the same length or longer than the ovary; dorsal sepal ≥ 8 mm long ................................... 4

2. Leaves lanceolate or elliptical, 5–23 mm wide; lip lateral segments longer than the median segment; viscidia separated............................................................................................. H. guilleminii Rchb.f.

– Leaves linear, narrow, 1–4 mm wide; lip lateral segments shorter than the median segment; viscidia united ................................................................................................................................................. 3

3. Floral bracts 5–17 × 3–4 mm, elliptical, about the same size as the pedicellate ovary, decreasing in size towards the inflorescence apex; pedicellate ovary 7–12 mm long; dorsal sepal 3–5 × 3–3.5 mm; petal posterior segment 2.5–4.2 mm long, oblong, apex obtuse; restricted to the Chapada dos Veadeiros, State of Goiás, Brazil............................................................................. H. minuticalcar sp. nov.

– Floral bracts 2.2–3.5 × 1.2–1.8 mm, ovate, shorter than the pedicellate ovary; pedicellate ovary 6.7–8.1 mm long; dorsal sepal 2.4–3 × 1.8–2.4 mm; petal posterior segment 2.1–2.7 mm long, lanceolate, apex acute; restricted to the southern and central regions of the Espinhaço Range in the State of Minas Gerais, Brazil.............................. H. pansarinii var. minuscula J.A.N.Bat. & Bianch

4. Dorsal sepal 11–20 mm long; petal anterior segment 8–11(–16) mm long, about the same size as the posterior segment; spur ovoid, scrotiform, ventrally compressed, 3–3.5 mm long............................. ...................................................................................................................... H. orchiocalcar Hoehne

– Dorsal sepal 8–12 mm long; petal anterior segment 1–4 mm long, less than half the length of the posterior segment; spur elliptical, 5–6 mm long ................................................... H. heringeri Pabst