Revision of the genus Jumellea Schltr. (Orchidaceae) from the Comoros Archipelago Author Rakotoarivelo, Fanny UMR C 53, Peuplements végétaux et Bioagresseurs en milieu tropical, Faculté des Sciences et Technologies, Université de La Réunion, 15 av. R. Cassin, BP 7151, F- 97715 Saint-Denis cedex 9, Réunion (France) fannypatricka@yahoo.fr Author Pailler, Thierry UMR C 53, Peuplements végétaux et Bioagresseurs en milieu tropical, Faculté des Sciences et Technologies, Université de La Réunion, 15 av. R. Cassin, BP 7151, F- 97715 Saint-Denis cedex 9, Réunion (France) thierry.pailler@univ-reunion.fr Author Faliniaina, Lucien Département de Biologie et Écologie végétales, Université d’Antananarivo, BP 906, Antananarivo 101 (Madagascar) faliniaina@gmail.com text Adansonia 2013 3 2013-01-31 35 1 33 46 http://www.bioone.org/doi/abs/10.5252/a2013n1a3 journal article 10.5252/a2013n1a3 541cee8d-9aad-4794-96fc-6b75cea4649d 1639-4798 5371059 1. Jumellea maxillarioides (Ridl.) Schltr. ( Fig. 3 ) Feddes Repertorium Specierum Novarum Regni Vegetabilis, Beiheft 33 (2): 299 (1925) ; Perrier de la Bâthie in Humbert H. (éd.), Flore de Madagascar, 49 e fam., Orchidées 2: 166 (1941) ; Du Puy et al ., hve Orchids of Madagascar , 1st éd.: 163 (1999) ; Stewart et al ., Angraecoid Orchids : 186 (2006) ; Hermans et al ., Orchids of Madagascar , 2nd éd.: 209 (2007) ; Cribb & Hermans, Field Guide to the Orchids of Madagascar : 310 (2009) . — Basionym: Angraecum maxillarioides Ridl. , Journal of the Linnean Society, Botany 21: 479 (1885) ; Angorchis maxillarioides (Ridl.) Kuntze, Revisio Generum Plantarum: 651, pl. 2 (1891) . — Lectotype (designated here): Madagascar . Fianarantsoa , Ambalavao , Ankafana , 1880, Deans Cowan 26 (lecto-, BM [ BM539237 ] ; isolecto-, Parker s.n. , K ! [ K000306584 ]). SPECIMENS EXAMINED. — Comoros . Grande Comore , La Grille Massif , 11°27’51.8’’, 43°20’25.4’’, 1076 m , 27.II.2009 , Rakotoarivelo et al. 061 ( REU !). Madagascar . Antananarivo , Mont Angavokely , 1920, Perrier de la Bâthie 12978 ( P [ P00094211 , P00094212 , P00094213 , P00094214 ]!) ; Toamasina , Maromizaha , II.1924 , Perrier de la Bâthie 16051 ( P [ P00094210 ]!) ; Angavobe Mont , 1600 m , 8.II.1992 , Pettersson 508 ( P [ P00094208 ]!) ; Mandraka , 1.IX.2009 , Rakotoarivelo et al. 029 ( TAN !). — Fianarantsoa , Ambondrombe , 21°52’47’’S , 47°15’32.9’’E , 1853 m , 12.I.2010 , Rakotoarivelo et al. 215 ( TAN !) ; Andringitra , 21°14’08’’S , 47°23’49.8’’E , 1118 m , 17.I.2010 , Rakotoarivelo et al. 227 ( TAN !). DISTRIBUTION. — Grande Comore and Madagascar (Antananarivo, Fianarantsoa). In humid forest, from 1000 to 1200 m elevation. DESCRIPTION Epiphyte, lithophyte or terrestrial plant, acaulescent or sub-acaulescent, stem covered by marcescent leaf sheaths. Leaves coriaceous, oblong, (26-41 × 11-15 cm ), imbricate, tight, conduplicate at the base, with a released leaf sheath ( 2.8-4 cm ), unequally bilobate at the apex, with rounded lobes. Inflorescences numerous (1-6 per plant); peduncle short ( 1.5-3.5 cm ), thick, covered entirely by 5 sterile bracts.Fertile and sterile bracts tubuliform. Pedicellate ovary twice longer than the peduncle ( 5-9 cm ). Flowers large, thick and leathery. Sepals and petals at the same size (30-36 × 7-9 mm ), ivory-white color on the inner face.Sepals oblong, slightly scurfy on the outer face, curved back, acute.Petals slightly crispate at the base, oblong, acute, and bearing a dorsal costule.Lip ovate or pandurate (37-38 × 16-17 mm ), narrowed at the base, gutter-shaped, carinate ( 19-20 mm ), widened in the middle, acuminate at the apex. Spur 2.5-5 cm long, slightly curved. Column with very thick arms (5 × 5 mm ), lobes of the rostellum acute at the joined tips. Anther cap triangular, supported by the lobes of the rostellum. Capsule fusiform.