Jumellea maxillarioides (Ridl.) Schltr.

Rakotoarivelo, Fanny, Pailler, Thierry & Faliniaina, Lucien, 2013, Revision of the genus Jumellea Schltr. (Orchidaceae) from the Comoros Archipelago, Adansonia (3) 35 (1), pp. 33-46 : 37

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.

Figures

FIG. 3. — Jumellea maxillarioides (Ridl.) Schltr.:A, habit;B, pieces of the perianth;C, peduncle and pedicellate ovary;D, column of pol- linated flower.Abbreviations:ms, median sepal;ls, lateral sepals;pt, petals; lp, lip with spur.Scale bars:A,3 cm;B, C,2 cm;D,2.5 mm.