J. exilis (Cordem.) Schltr. (Fig. 1)

Distribution:— Mauritius, Réunion and Madagascar

Specimens examined: — MAURITIUS. Mare Longue–Macabé Road, 11 October 1962, Vaughan s.n. (MAU 0002109) (fr.) ; Macabé, 1 November 1962, Vaughan s.n., (MAU) ; Macabé, 12 October 1968, Edgerley s.n., (MAU) ; Tamarind Falls, 21 December 1968, Wiehe s.n. (MAU) ; Brise Fer, 2 August 1982, Lamusse s.n. (MAU) ; Rivière Dimanche–Simonet, 21 March 1984, Lamusse s.n. (MAU 0008290) (fl., fr.) ; Mondrain, 14 June 1996, D. Florens & D’Argent s.n. (MAU) ; Rambouillet – La Nicolière, 400 m, 6 August 2009, 20 º 09’ 53” S, 57 º 36’ 53” E, Pynee et al. s.n. (MAU 0004857) (fr.) ; Brise Fer, 595 m, 10 June 2009, 20 º 22’ 35’’ S, 57 º 26’ 34” E, V. Florens & Baider CB 2244 (MAU 0008274) (fl.) ; Le Pouce, ca. 800 m, 20 º 11’ 52” S, 57 º 31’ 43” E, 24 September 2011, V. Florens & Baider CB 2523 (MAU 0009140) (fl.) ; s. loc., 1847-52, Boivin 1055 (MAU) .

Habitat: —In Mauritius: epiphyte in transitional and evergreen forest (400–650 m elev.) on canopy trees of 10–18 m high and lithophytic on micro ledge on steep cliffs at about 800 m elevation or on large boulders.

Conservation status: —The species is assessed in Mauritius as Critically Threatened CR B1ab(i, ii, iii, iv) + B2ab(i, ii, iii, iv); C2a(i); D as per IUCN red list criteria (IUCN 2001).

Phenology: —In Mauritius: flowering in June, September, October, November. Fruiting: October to December.

Notes: — Jumellea exilis has a ramose, creeping stem with non-angled leaves, and oblong labellum. On the other hand, J. recta with which it has previously been confused on Mauritius, has a non-ramose erect stem with leaves angled above the articulation with the sheath, and a rhombic labellum.