The genus Disperis (Orchidaceae) in Madagascar, the Comores, the Mascarenes and the Seychelles Author Croix, Isobyl la Author Bosser, Jean Author Cribb, Phillip J. text Adansonia 2002 3 24 1 55 87 journal article http://doi.org/10.5281/zenodo.5180356 1639-4798 5180356 13. Disperis majungensis Schltr. Feddes Repert. Spec. Nov. Regni Veg. Beih. 33: 108 (1925) ; H. Perrier in Humbert H . (ed.) , Fl. Madag. , 49 e fam., Orchidées 1: 190 (1939) ; Du Puy et al., Orch. Madag. : 135 (1999) . — Type : Perrier de la Bâthie 13038 , Madagascar , Majunga (holo-, P !, photo K !) . Slender terrestrial herb 10-13 cm tall; tubers 16-20 × 12 mm , globose or ovoid. Leaves 2, sessile or with a short 2-3 mm long petiole, alternate, borne at about the middle of the stem, 2-4.3 × 1.2-2 cm , ovate, acute, dark green above, red below. Inflorescence 1-3-flowered; bracts (5-)8-16 × 6-8 mm , leafy. Flowers violet; pedicel and ovary 14 mm long. Dorsal sepal 6 × 0.8 mm , linear; lateral sepals free more or less to base, more or less 5 mm long, deeply saccate, with an obtuse spur 1.5 mm long. Petals 5.5-6 × 2-3 mm , more or less semicircular, adnate to the dorsal sepal and forming a shallow hood c. 5-6 mm long, 4.5 mm wide, with the dorsal sepal protruding slightly between the petals. Lip 4.5 mm long over all, with a claw 3 mm long, the basal 2 mm fused to the column; appendage 3- lobed, like a trident, the side lobes erect, 1.5- 1.8 mm long, conical with inrolled margins, like the fingers of a glove, densely shortly papillose-pubescent; mid-lobe triangular, obtuse, 2-2.3 mm long, flat, often bent over to the front, densely shortly papillose-pubescent. Rostellum arms 3 mm long, not enlarged at the tips. — Fig. 6A. DISTRIBUTION. — Madagascar ; endemic. HABITAT. — In humus, in rocky wood on calcareous soil; sea level- 100 m . MATERIAL STUDIED. — W MADAGASCAR : Morat 4842 , Antsingy of Antsalova , Res. Nat. no. 9, Jan. 1975 ( P !); Perrier de la Bâthie 13038 , near Majunga, not far from the sea, Feb. 1920 ( P ) . This species is readily recognised by its very characteristic lip appendage. It is a rare species, collected only twice, the localities being very remote from each other.